Nearly all UK drivers say headlights are too bright

2025-11-1814:11857879www.bbc.com

The study, commissioned by the Department for Transport, was completed by Berkshire's TRL.

Nathan BriantSouth of England

Getty Images A generic picture showing a car's headlights glowing at night on an empty country road, with a grassy bank on the right.Getty Images

Nearly all UK drivers said they thought headlights were too bright and that they have been dazzled by oncoming vehicles, according to a major study.

The government said last week that it will take a closer look at the design of cars and headlamps after concerns about lights dazzling drivers.

A study commissioned by the Department for Transport (DfT) found 97% of people surveyed found they were regularly or sometimes distracted by oncoming vehicles and 96% thought most or some headlights were too bright.

Dr Shaun Helman, who led the research for Berkshire-based Transport Research Laboratory (TRL), said it provides "compelling evidence" that lights' glare is a "genuine issue for UK drivers".

New measures will be included in the government's upcoming Road Safety Strategy, reflecting what is becoming an increasingly fraught issue for road users.

TRL's data suggests that LED and whiter headlamps may be linked to glare and that drivers might find their whiteness harder to cope with.

Of those surveyed, 33% said they had either stopped driving or are driving less at night because of lights, while another 22% said they would like to drive less at night but have no choice.

A total of 1,850 drivers, matched to the age and gender split of the country's licence holding population, were surveyed for their views.

TRL said LED lights used in vehicles are brighter, more concentrated and emit more blue light, which human eyes struggle with more at night.

The RAC's senior policy officer Rod Dennis said: "Having campaigned hard for this study, we welcome its findings which independently confirm what drivers have been telling us – that rather than being an imagined phenomenon, some bright headlights do cause a glare problem.

"While drivers clearly benefit from high-performing headlights, it's important this doesn't lead to others suffering the effects of dazzle, so a balance needs to be struck," he added.

Mr Dennis said that it is "vital" TRL's report is "reviewed carefully to put us on a path towards changes that ultimately benefit all road users."

Denise Voon, a clinical advisor at The College of Optometrists, said the DfT should "take immediate, actionable steps to support drivers and commission more detailed research, specifically into how headlight regulations need to change".

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Comments

  • By njarboe 2025-11-1815:1126 reply

    One of the main reasons people want/need brighter headlights is that there is much more light inside the car from screens. These don't let your eyes adjust to the dark properly. Older cars had dim green lighting for the gauges and even had a knob to adjust the brightness up and down. You could create a very dim interior instead of the huge amount of white light you get with modern cars and the multiple screens.

    I'm happy my Tesla does a decent job of having the screen be quite dark at night but the headlights are quite bad with the horizontal cutoff style that only lights the first few feet of horizontal ahead of the car. I need to see those deer and elk on the side of the road, damn it.

    • By Wistar 2025-11-1816:3718 reply

      Lately, I see a lot of drivers who turn on their brights and just leave them on and this includes cars with the older halogen and even incandescents. This is a change in behavior.

      As for LEDs, to me, the Tesla Model 3 headlights are the worst offender, but not all of them, just the majority. I can look down a column of oncoming cars and pick out the Model 3s from a few blocks distance. I suspect that the Model 3 headlights are often maladjusted as they have a user/driver-accessible headlight aiming menu and it looks to me like a lot of Tesla owners get in to that menu and do some freelance aiming. Plus, a lot of Model 3 drivers around here—and there are a lot of them here (Seattle area)—seem to turn on everything, brights, DRLs, fog lights, every lamp.

      Another egregious offender is the Acura Jewel-Eye headlights although I am seeing ever more cars with headlights set to stun.

      The worst situation is waiting at an intersection where the pavement is crowned to drain the intersection, making the headlights on the cars opposite just miserable to contend with. Sometimes so bad I can’t see the traffic lights.

      I am not sure what the solution is but the situation is getting worse and quickly.

      • By 0xfeba 2025-11-1817:2513 reply

        > Lately, I see a lot of drivers who turn on their brights and just leave them on and this includes cars with the older halogen and even incandescents. This is a change in behavior.

        This is one of my pet peeves.

        I've categorized it into what I believe are the main causes:

        1. People just don't know as well today that the blue indicator means you're blinding people

        2. People with newer cars which will automatically turn off the headlights, including the brights, when you turn off and leave the car.

        3. People with older cars where the low-beams are burned out or broken

        I've been tempted to purchase digital billboard space to raise awareness. Eg., "If this blue indicator is on, you're blinding everyone".

        And/or, get a mirror on my trunk that I can adjust the angle of from inside the cabin to reflect back high-beams at the driver.

        Mostly I'm hoping that automatic high-beams, like some Ford trucks I've seen do well, proliferate more!

        • By pksebben 2025-11-1817:444 reply

          I have become an aggressive counter-flasher. This has yielded in some cases new knowledge - that the low beams of a lot of cars these days look like high beams (indicated when they flash back, and it's the brightness of a thousand suns).

          For those behind me, I've discovered that my side mirror has an angle where it reliably bounces the beams back. I've gotten more than a couple of drivers to turn their beams down with this method (but they have to be tailgating for it to work, which usually means we're already in an adversarial situation).

          • By aceazzameen 2025-11-1817:591 reply

            Haha I've also angled my side mirror out of my eyes, which incidentally is back towards the car behind me. I of course angle it back if I need to change lanes, but it's such an annoying thing I have to do just to see the road ahead of me.

            At this point I put full blame on car manufacturers and lack of government regulation and enforcement. Lights will keep getting brighter because lights are getting brighter. It's a death spiral.

            • By johnmaguire 2025-11-1820:261 reply

              My 2017 Ford Fusion has an auto-dimming driver side mirror. I hate driving a car at night without this.

              • By aceazzameen 2025-11-193:481 reply

                My rear view mirror does this, I wish my side mirrors did too. Although recently I've noticed some cars headlights can even pierce my rear view mirror's polarized dimming. It never used to be a problem in the past. I've seen the difference when drivers turn their high beams on and off. It always did a great job against driver's brights including large trucks. But occasionally there's now a vehicle with the light of a thousand suns that is too bright for the auto-dimming.

                • By bergfest 2025-11-197:08

                  The older manual rear view mirrors worked much better in my opinion.

          • By notyourwork 2025-11-1818:291 reply

            That indicates the low beams are incorrectly adjusted.

          • By nrds 2025-11-2015:371 reply

            When I get incorrectly flashed I force my high beams on and keep them on, FYI. Don't do it.

            • By pksebben 2025-11-2119:561 reply

              Maybe this ought to indicate to you that your low beams are blinding other drivers dangerously.

              If you have OEM headlights, I can understand your frustration - neither you nor the other driver has control over that. I think this is what OP posted this whole thread about.

              If, however, you've installed third-party LED headlights, then you're sort of on the hook for this.

              I'd add that whoever it was that 'incorrectly' flashed you is long gone by the time you're leaving the highs on and blinding everyone in your path. That's aggressive and uncalled for.

              • By nrds 2025-11-221:00

                I only do it if no one is behind the flasher; I thought was obvious. And I have OEM headlights.

          • By qmr 2025-11-1910:531 reply

            I've half jokingly told my wife I'm going to make a parabolic mirror for her to aim back at such drivers.

            • By Wistar 2025-11-2020:12

              … or a steerable corner-cube array or retroreflector prism. Steerable in that it needs to slightly redirect its reflection to above the light source—to the windshield area of the offending vehicle—rather than exactly back to the light source.

        • By pipes 2025-11-1819:539 reply

          I might just be getting old, but more and more I see people not using indicators and not understanding the rules of junctions. Tail gating also really annoying.

          I was in a mates car recently and it scared the hell out of me, he was tail gating for most of a 3 hour journey. Eventually we got to a bit with chevrons and he wasn't obeying the rule staying N chevrons away from the car in front. I told him and he replied "nonsense, my car beeps if I'm too close to the car in front" I didn't have the energy to point out that is a collision warning not a safe distance measurer type device.

          • By ash_091 2025-11-1820:193 reply

            The recommended 3 second gap is a much bigger distance than most people recognise, especially at high speed.

            On another note- I feel sad that you could tell your mate "the way you're driving is making me uncomfortable" and be met with basically "your discomfort isn't valid because [technology] so I won't change my behaviour".

            • By MichaelBurjack 2025-11-1822:044 reply

              As someone who continues to mask in public shared-air settings for my own health, I am entirely unsurprised by that response and get it all the time.

              Recently heard from a friend that also continues to mask when sharing air, they had arranged car pooling for one of their children. And just this morning the other parent texted saying "your child wearing a mask makes me uncomfortable so we can no longer car pool".

              So … yeah. Entirely unsurprised by that attitude. "Every person for themselves but also not if it's something I personally dislike."

              • By executesorder66 2025-11-199:42

                > "your child wearing a mask makes me uncomfortable"

                What about that could possibly make someone uncomfortable. How does it have any effect on the other parent?

              • By alehlopeh 2025-11-1823:001 reply

                Isn’t all air shared?

                • By MichaelBurjack 2025-11-1823:171 reply

                  Not in a way meaningful to assessing infectious risk, no.

                  I consider outdoor air to be unshared, except in cases of large dense crowds (such as say outdoor festivals or sporting events).

                  I consider risky shared air to be indoor air with one or more other individuals that are not known to be taking infection-prevention precautions.

                  One can measure CO₂ as a proxy to rebreathed air fraction.

                  For example, a CO₂ reading of 2300ppm (common in a small or medium room with a few others, or larger rooms with a crowd or conference room, or in a car) means 5% of your air is rebreathed (5% of your intake is output from another person's lungs).

                  A way to think about this is we take ~20 breaths a minute on average. So in that scenario, it would be equivalent to one breath every minute coming directly from someone else's lungs. If they happen to be contagious with an airborne contagion (such as Covid, or influenza, or RSV), there's a high likelihood that you will catch it if you're spending more than a short time in that environment.

                  There are nuances, such as maybe the air is being scrubbed (eg by a HEPA filter) which won't affect the CO₂ levels but will drastically lower the infectious risk of that environment.

                  More reading: https://www.energyvanguard.com/blog/what-a-carbon-dioxide-mo...

                  • By gblargg 2025-11-195:501 reply

                    > One can measure CO₂ as a proxy to rebreathed air fraction.

                    On this topic, I got a CO₂ meter fairly recently and was shocked how quickly it spikes with a couple of people in a car with the windows up and on recirculate. Easily over 2000 after a few minutes. I have to remind myself regularly when it's really hot or cold outside to keep the vent setting on fresh air.

                    • By xattt 2025-11-198:141 reply

                      I’d love for cars to get some sort of sniffer that will switch to recirc if it detects a spike in exhaust fumes.

                      • By FireBeyond 2025-11-1919:57

                        I had a Jaguar that had an air quality sensor that would switch to recirc based on particulates and then back to fresh air when the threshold indicated.

              • By pipes 2025-11-1822:101 reply

                Genuine question (as in not a passive aggressive question!) why do you and your friends child mask?

                • By MichaelBurjack 2025-11-1822:404 reply

                  Not sure why you'd ask me that vs. use Google, feels like cornering a random driver to defend "Why do you use seatbelts?".

                  But I'll offer one reply at your word that it's genuine and not passive-aggressive.

                  1. I am currently dealing with the after-effects of a previous Covid infection that requires expensive, ongoing medical treatment. I'm not anxious to test what additional infections may cause.

                  2. Wearing an N95 respirator is a cheap and easy preventative measure that is highly effective.

                  3. I adjust my habits based on measured risk. In my part of the world (Alberta), the current risk forecast for November 8-21 is that approximately 1 in every 81 people are currently infected with Covid. I relax my masking when it's 1 in 10,000 or less (which is not an unreasonable number; it's been there in the past).

                  4. Recent medical studies suggest that repeated Covid exposure is particularly harmful for children. Long Covid is now the #1 chronic condition in children in the US (displacing asthma as the top chronic childhood condition). As a parent, I see it as my responsibility to give my children the best chance at a long, healthy, medical-intervention-free life.

                  A few links (or just use Google):

                  - Covid monitoring in Canada: https://covid19resources.ca/

                  - Long Covid overtaking asthma as top childhood chronic illness: https://jamanetwork.com/journals/jamapediatrics/fullarticle/...

                  - Rolling Stone on Covid's affects on children: https://www.rollingstone.com/culture/culture-features/long-c...

                  - Remarks by Violet Affleck: https://www.youtube.com/watch?v=HBTjCqIxorw

                  - Tom Hanks: https://whn.global/youve-got-a-friend-in-me-tom-hanks-shows-...

                  - A longer answer than mine: https://whn.global/yes-we-continue-wearing-masks/

                  • By gblargg 2025-11-195:54

                    Thanks for sharing. I tend to think people wearing masks these days are a little loony, but these are solid reasons for specific cases and environments. I wouldn't shun someone because they're wearing a mask, though. It seems like a significant discomfort so I don't partake (and I get sick extremely rarely and stay home those few times).

                  • By pipes 2025-11-197:10

                    I genuinely didn't think to use Google for this. I had no idea about the list of reasons. It wasn't passive aggressive, I was curious. Thanks for sharing this.

                  • By oxag3n 2025-11-1921:11

                    It's nice to see that my family is not alone in taking these precautions.

                    However as with the bright headlamps, there's no real solution coming anytime soon. I mean there are solutions - nasal vaccines and proper NHTSA regulation, but I have no hope in any of those to materialize.

                  • By DoomDestroyer 2025-11-191:052 reply

                    [flagged]

                    • By MichaelBurjack 2025-11-191:221 reply

                      I'm not here to debate the scientific evidence; labelling well-researched peer-reviewed studies as "paranoia" (your words, before editing your reply) because you don't like the outcome is absolutely your choice, and tells me there's little chance any reasoned reply will be meaningful as you've made up your mind.

                      For others that might be curious:

                      Your anecdote around acute infection recovery makes the common mistake of confusing acute infection (the period where you "feel sick") with long-term systemic (post-acute) symptoms.

                      The typical influenza (flu) only has an acute phase; once you're done "feeling sick", the virus has been eradicated from your body. And unfortunately, many talking heads keep repeating "Covid is now just like the flu" which ignores long-term consequences of repeated Covid infection, which does not behave like the flu (it is not an acute-phase only illness).

                      And this isn't unique to Covid, viruses with post-acute phases are well known and well studied:

                      - HIV is the acute phase that (years later) leads to AIDS;

                      - Epstein-Barr virus (EBV, or "mono") is a herpes-family virus that goes dormant after the acute phase and often later triggers ME/CFS

                      - Herpes virus in the form of chickenpox goes dormant after the acute phase and frequently later leads to shingles;

                      - and many others; Google is your friend.

                      Distinguishing between viruses that have acute-only vs. post-acute phases is a key input to my personal risk assessment stance. I value having as long and healthy a life as I can.

                      And just as I have, you're free to decide what risk tolerance you're comfortable with for your lifestyle and longevity goals. If you require the extra adrenaline kick of feeling morally superior by publicly passing judgement upon others' choices, have at it — genuinely! — and I hope you find all the missing joy you need.

                      • By DoomDestroyer2 2025-11-191:461 reply

                        > I'm not here to debate the scientific evidence; labelling well-researched peer-reviewed studies as "paranoia" (your words, before editing your reply) because you don't like the outcome is absolutely your choice, and tells me there's little chance any reasoned reply will be meaningful as you've made up your mind.

                        A web page about why people are still wearing masks when the risks to most people is extremely low is paranoia and is not "well research peer-reviewed studies". It is people cherry picking things because to justify their own neurosis.

                        As I said I've had to deal with someone that behaves exactly like you do for my entire life. I hope your children don't resent you for it, because I still have a hard time dealing with my mother as a result.

                        You are doing exactly the same thing as she does. Whenever anyone points out that she is being paranoid (which is everyone because she is), she will just get angry and demand you do it. Which is pretty much what you did here.

                        > Your anecdote around acute infection recovery makes the common mistake of confusing acute infection (the period where you "feel sick") with long-term systemic (post-acute) symptoms.

                        The vast majority of people do not suffer this with COVID.

                        > The typical influenza (flu) only has an acute phase; once you're done "feeling sick", the virus has been eradicated from your body. And unfortunately, many talking heads keep repeating "Covid is now just like the flu" which ignores long-term consequences of repeated Covid infection, which does not behave like the flu (it is not an acute-phase only illness).

                        For the vast majority of people they get it, they recover from it and they get on with life.

                        > Google is your friend.

                        It is actually better to talk to a medical professional. As they actually know what they are talking about.

                        > And just as I have, you're free to decide what risk tolerance you're comfortable with for your lifestyle and longevity goals. If you require the extra adrenaline kick of feeling morally superior by publicly passing judgement upon others' choices, have at it — genuinely! — and I hope you find all the missing joy you need.

                        That is what you did and are continuing to do. You are the one who likened it to seatbelts that have a tangible and demonstrable safety record to a virus that often most people catch and shake off after a week. It allows you to feel morally superior and every reply you've written so far is essentially nothing more than morally grandstanding.

                        • By wizzwizz4 2025-11-196:47

                          > The vast majority of people do not suffer this with COVID.

                          How do you know? The vast majority of people don't check. (The plural of anecdote is not data.)

                          > As I said I've had to deal with someone that behaves exactly like you do for my entire life.

                          Baseless worry and justified concern are behaviourally quite similar, apart from the actual existence of the phenomenon that is the subject of concern. Identifying a behavioural similarity does not help you distinguish between legitimate risk and hypochondria.

                    • By exmadscientist 2025-11-191:501 reply

                      > > A longer answer than mine: https://whn.global/yes-we-continue-wearing-masks/

                      > I skimmed read a bit of this (pretty sure I've read it before a few years ago). This is all Germaphobe logic.

                      Worse, that page is AI slop. There are good reasons for some people to wear masks. You won't find them on that page, at least not as believable arguments.

                      • By MichaelBurjack 2025-11-191:581 reply

                        That page has existed in one form or another for quite some time. I don't believe there's any AI slop in the substance of the content or arguments, and the rationale is presented in a balanced way.

                        In fact, the section "Are you going to wear a mask forever?" speaks directly to the OP's asking why I wear masks, and their short answer, that "masks are a tool we can use when and where it makes sense—especially indoors, in poorly ventilated areas, or when community transmission is high." is, if anything, a more concise version of my longer reply at https://news.ycombinator.com/item?id=45973239.

                        The WHN has a very distinguished set of experts that review and vouch for the content on the site (https://whn.global/meet-our-team/).

                        I'm sure there are even better sources out there, but as I was looking to answer an inquiry without taking on excessive personal research time, I felt this was a good summary article. If you have a better source from a similarly credentialed team, I look forward to reading it!

                        • By exmadscientist 2025-11-192:022 reply

                          I don't know what to tell you, man. It's classic ChatGPT output, with its weird italics, sometimes-bolded bullet point headers, oddly placed and oddly frequent em dashes, and generally really distinct voice. I didn't recognize it until I started to use ChatGPT myself, and now I see it everywhere.

                          I also distrust it immediately, because I know how often ChatGPT bullshits me, so I can't help but assume it's bullshitting here too.

                          • By MichaelBurjack 2025-11-192:101 reply

                            You keep attacking the layout and formatting of the article, and not the substance.

                            Maybe this article works better for you, and if not, I'm sure you're just as capable at using Google as I am. There are many other high-quality studies that cover this topic in exhaustive detail.

                            https://www.cidrap.umn.edu/covid-19/commentary-wear-respirat...

                            • By anonymouskimmer 2025-11-195:18

                              As a novid, thanks for taking the time to educate here.

                          • By wizzwizz4 2025-11-199:00

                            This is an FAQ where each entry has a TL;DR. For question 9 in particular, the list consists of items and explanation, where the author chose to use <ul> / <strong> instead of <dl> / <dt> / <dd>. This is one of the situations where the "sometimes-bolded bullet point headers" formatting is appropriate. (The most semantically-correct formatting would be paragraph headings, as seen in LaTeX; but HTML doesn't have these.)

                            The <em> tag is used to indicate stress emphasis. This is the intended purpose for which the tag was added to HTML, not "weird italics". (I type by transcribing my speech, so I tend to overuse this: one of my editing passes is removing unnecessary <em>s.) This article only contains 9 <em>s in 10 questions: of these, I'd remove the emphasis from two of three "well-fitted masks", and reduce the other to just "well-fitted".

                            Unspaced em-dashes are often used to offset parentheticals – though I prefer spaced en-dashes myself – and these are both long-standing conventions (see https://en.wiktionary.org/wiki/%E2%80%94). Parenthetical dashes are common in formal writing, and this is formal writing.

                            As someone who frequently wrote in more-or-less this style (where appropriate) before GPT-1 was even made, who's also fairly decent at spotting ChatGPT output, I don't think this is ChatGPT at all. Apart from superficial formatting considerations, it's not the distinctive ChatGPT voice; and the most distinctive part of ChatGPT output is its inappropriate use of voice and formatting, whereas all of these stylistic choices are easily-justified. Perhaps most importantly, it actually says something.

              • By throwaway2037 2025-11-1823:341 reply

                [flagged]

            • By gblargg 2025-11-195:472 reply

              I was with a friend who was driving and he literally said that the car in front of him was driving fairly close to him. I have a funny bumper magnet that says "sorry for driving so close in front of you" that mocks this inversion of cause.

              • By johnisgood 2025-11-1912:15

                It is funny, yet I wonder how many people actually get it. :D

              • By mensetmanusman 2025-11-1911:56

                This is amazing, ha

            • By pipes 2025-11-1822:081 reply

              Yes on your last point, I feel exactly the same way. If anyone told me I was driving too fast and they were uncomfortable I'd immediately be apologetic and slow down, and I'd genuinely feel bad about it.

              As I get older I've realised that most people in my life react negatively if I express emotion that what they are doing is upsetting. It is only recently that I've realised my sample size is small and this kind of gas lighting behaviour is not ok. I've actually reached a point where I'm thankful that the internet popularised the phrase because it had helped me diagnose shitty behaviour that I've tolerated my whole life.

              • By ash_091 2025-11-1922:12

                > most people in my life react negatively if I express emotion that what they are doing is upsetting

                Right. I guess they feel accused, as though you're attacking their behaviour rather than sharing how it makes you feel, and instinctively become defensive in response?

                It's wonderful to meet people who don't think this way. My partner is incredible at this, I can tell her "when you X I feel Y" and know without a doubt her reaction will come from a place of trying to work together to understand whether the problem and solution exist in X, Y or both.

          • By BrenBarn 2025-11-1820:551 reply

            I'd say just in general people have become way more cavalier and oblivious as drivers. I frequently see people doing wild stuff like driving at night with no headlights, or driving for several blocks in a bike lane. Every single yellow light is pushed to the limit, with often at least one (and sometimes multiple) drivers running the red light as well. I feel like a lot of is connected to a more general post-COVID decline in awareness of how one's actions affect others. People are just fine with doing anything they can get away with. I suspect the trend won't be reversed without a major increase in enforcement.

            • By jackvalentine 2025-11-1822:113 reply

              I’ve noticed the same, and also people’s behaviour generally everywhere has bottomed out and not recovered. I was speaking to an ED nurse who said people have just forgotten how to relate and violence is through the roof every night in the hospital.

              Did we all get subtle brain damage?

              • By StopDisinfo910 2025-11-197:261 reply

                I have legitimately been wondering for quite some time if we are not in a leaded gas kind of situation where something is adversely affecting the global population as a whole and we are left in the dark. Plenty of contenders between industrially processed food, social media, mobile phones. It might just be me getting paranoid however.

                • By alphager 2025-11-199:041 reply

                  Covid does long-term brain damage.

                  • By duskdozer 2025-11-203:28

                    I do think there's oddly disproportionate silence on covid infection as a potential factor in the overall life-enshittification lately.

              • By wartywhoa23 2025-11-1912:35

                No. Too many just got a jab and some boosters.

          • By wat10000 2025-11-1820:21

            People just don’t care about driving.

            I get it. Maybe you're not interested in it. You’re at A, you want to arrive at B, and driving is just your tool for getting there.

            But to misquote Trotsky, you may not be interested in driving, but driving is interested in you. Driving is the most dangerous thing most drivers do on a regular basis. Probably by a significant margin. Even if you hate it, respect it. Put in the effort to do it well.

          • By 0xfeba 2025-11-223:14

            > I might just be getting old, but more and more I see people not using indicators and not understanding the rules of junctions. Tail gating also really annoying.

            Same. I've also noticed that people entering the interstate seem to _expect_ that cars already on the interstate move over, or change speed to let them merge. Usually at 10-15 MPH slower than the speed of traffic.

            I've made a point to, when I cannot move over, remain in my lane at the same speed. And I've had people just absolutely wait until the last moment of a long on-ramp to speed up, or slow down to merge. It's bizarre.

          • By paradox460 2025-11-1820:264 reply

            My favorite is that if you try to follow a safe distance, some jerk will immediately move to fill the space

            • By avidiax 2025-11-197:523 reply

              Just realize that the sort of people that move to fill the space are not the sort to leave even 2 seconds of following distance.

              So once you restore your following distance, that person has cost you less than 2 seconds.

              Is it a bit annoying? Sure. But it's not a reason to start tailgating (not that you were necessarily claiming that).

              • By watwut 2025-11-199:21

                No, because once you to restore the distance, you have to go slower. The cars behind you then fill the restored space the moment they feel they can, because they perceive you as the slower car. If this happen with multiple cars and in practice it does, you are suddenly going very slow.

                The fact is, you can have only so much space in front of you as other cars allow. I had to reduce the distance literally because of this. It then stopped happening.

              • By paradox460 2025-11-1918:33

                The problem is, you move back to restore your following distance, and now another person moves in to fill it

              • By Viliam1234 2025-11-2021:37

                My friend ended up in a hospital, when some jerk moved into the small space in front of him, and then had to jump on the brakes because the first car unexpectedly slowed down. My friend also jumped on the brakes but the distance was too small.

            • By gblargg 2025-11-195:56

              I leave plenty of distance and don't have that problem. Occasionally people do fill the space, perhaps because I'm providing a safer place than people tailgating. This reduced risk benefits me too. I just slow a little bit to re-establish my following distance.

            • By CBLT 2025-11-190:32

              About once a week I see someone cut in even though the person is literally tailgating. The driver at the back has to brake+swerve to not cause a high speed collision. There's actually nothing you can do to prevent these people from getting ahead of you. Don't worry about what they'll do, it's insane anyways. Just try not to die.

            • By pipes 2025-11-1822:11

              Or toot their horn and flash their lights behind you

          • By abustamam 2025-11-1820:06

            Wow this gives me anxiety just reading. My 2012 BMW has a warning everytime I turn it on. "DO NOT RELY ON BEEPS" (I'm paraphrasing of course.)

            And yeah, I don't let tooling on my car replace common sense driving habits. I still turn my head when reversing, even if I can see what's behind me on the camera. I think it's crazy that people rely so much on unreliable tech on their cars.

          • By smileysteve 2025-11-190:56

            In my city, if you use your indicators, traffic is more likely to close the gap on you than coordinate you.

          • By soneil 2025-11-1918:15

            Isn't it great being able to rely on tech that isn't doing what we think it's doing.

            I don't even need to keep an eye on my cooking anymore, the smoke alarm beeps when I get too close.

          • By DoomDestroyer 2025-11-190:402 reply

            The N chevrons away on those roads are often ludicrously far apart. It it well over the 2 second rule and nobody follows it.

        • By LeifCarrotson 2025-11-1818:0210 reply

          My other pet peeve is the opposite - they've got LED daytime running lights, and use those instead of headlights. They're driving around at 11pm with no taillights and abysmal forward lighting, but there's enough of a glow from the DRLs that they assume their lights are on.

          Or worse, they're accustomed to "automatic" lights and don't even know where the switch is, so they're driving around at dusk or in fog, rain, or snow in a white, gray, or black vehicle without their lights on.

          I have also been tempted to purchase digital billboard space, but not on the side of the road. I want LED signs on my roof rack (one forward, one back) with column or two of buttons on the dash to call up a slate of messages:

          1. TURN YOUR BRIGHTS OFF! BLUE MEANS BLINDING.

          1b. OW! YOUR HEADLIGHTS ARE MISALIGNED.

          2. TURN YOUR HEADLIGHTS ON! THOSE ARE DRLs.

          3. TURN LIGHTS ON TO BE SEEN EVEN IF IT'S NOT DARK.

          4. MY SAFE FOLLOWING DISTANCE IS NOT A SPOT FOR YOU.

          5. YOU ARE TAILGATING. I WILL NOT SPEED FOR YOU.

          6. YIELD DOES NOT MEAN STOP.

          7. I AM ZIPPER MERGING, NOT CUTTING THE LINE.

          8. DRIVE CAREFULLY! I JUST SAW A DEER.

          9. GO AHEAD, I SEE YOU.

          10. YOU HAVE A PROBLEM WITH YOUR VEHICLE, PULL OVER.

          11. THANK YOU!

          Plus a few spare slots to be implemented as needs arise.

          I've been unimpressed with the automatic high-beams on my wife's newer Toyota and on other rentals I've driven, they usually depend on a direct line-of-sight to the other car's headlights, which means they stay on just long enough to hit the windshield of another car cresting a hill and blind them. Then they courteously turn off a few camera frames and vision analyses after the low beams become visible. If a __competent__ driver is controlling the high/low beams manually, they'll see the headlights of the other car illuminating the trees and such and turn off the high beams a couple critical seconds earlier. But I admit that the automatic systems are miles better at managing it than the __incompetent__ drivers who are all too common.

          • By webnrrd2k 2025-11-1820:483 reply

            This hit on a peeve of mine, that automatic high beam systems really suck for pedestrians. Manual control is genuinely better in this regard. Try walking around at night in a wealthy neighborhood, and about 1/8 of the cars just blind every pedestrian.

            • By XCabbage 2025-11-1912:501 reply

              I assume you're an American? As a Brit, your comment confuses me. Why would anyone ever have high beams on at all in anything reasonably described as a "neighbourhood"? Do built-up areas in the US not reliably have street lighting?

              Here in the UK, it is pretty much universally the case that if there are buildings, there are street lights. (Maybe there are occasional exceptions where there's a single building in the middle of nowhere on a rural road; I'm not sure. And I suppose there must be occasional outages of street lighting even in e.g. dense city centres. But such things are rare.) Having high beams on in almost any context where there are buildings around is therefore unnecessary, against the Highway Code, and quite possibly criminal under RVLR reg 27.

              • By saltcured 2025-11-1919:061 reply

                I'm not the one you asked, but I think a lot of 'wealthy' neighborhoods in the US mean suburbia with larger single-family-home lots, and roads often feel a bit more rural. In my area in California, these are often unincorporated (county) lands just outside larger towns.

                You sometimes see a very clear boundary. The more middle-class housing is subdivisions built all at once somewhere in the 1960s-2000s, with underground utilities and street lights. This infrastructure was mandated by the city, when the developers were looking to get their newly built neighborhood annexed into it. Around the next corner, darker streets with overhead utilities and more spread out lots with oversized "McMansion" houses. These are following the more relaxed county building codes and had the space available for such construction.

                These roads are also more likely to have expensive new cars with all the computerized functions. Walking in this limbo world at the edge of our town, I've also noticed being blinded by cars as a pedestrian with more dynamic effects. I suspect are the car's system actively painting me with more light. It is a little bit like the "fringing" you see when the cutoff of older HID projection lamps sweeps over you due to road undulation. But it happens too quickly and both vertically and horizontally. It feels like being hit with a targeted spot light.

                I wish the engineers spent the same care to put a dark halo on a pedestrian face as they do for oncoming drivers. Even when carrying my own flashlight, such encounters can be dazzling enough to basically go blind and not be able to see the dark paving in front of me for a minute. My light is more to make me visible to the cars than to really illuminate my path for myself. It doesn't stand a chance against the huge dynamic range of these car lighting systems.

                • By webnrrd2k 2025-11-1921:04

                  Yes, exactly, very well explained.

            • By jojobas 2025-11-1912:35

              I'm pretty sure pedestrians would rather blink a few times than get run over.

            • By duskdozer 2025-11-197:47

              This is a big reason why "high-beams as default" is not the right choice

          • By boogieknite 2025-11-1823:501 reply

            if you ever visit Portland make one up reading YOU HAVE THE RIGHT OF WAY. drivers keep it weird here by ignoring the rules of the road for some kind of "no no i insist, after you" as if theyre giving some gift, but instead just confuse everyone

            if im biking and waiting at a stop sign: without fail, the last car in a long line of cars will slam on the breaks and insist i go when they have no stop sign. it would have been faster for everyone if they just kept driving and i cross after they pass, like the rules of the road prescribe

            • By dayjaby 2025-11-190:381 reply

              Defending that particular kind of driver: He might not have known to be the last car. But one thing he knows for sure: a long line of cars in front of him. Speeding up or keeping distance is pointless, so he uses that moment to be friendly instead.

              • By boogieknite 2025-11-197:03

                i prefer predictability to friendliness every time

          • By gblargg 2025-11-195:58

            I actually made an LED sign for the rear of my van, with over a dozen messages, including some peaceful ones like yours (sorry, thanks). One was for headlights. I made it IR-controlled and used an older Android smartphone with IR blaster and an app that gave me labeled buttons to show the messages.

            https://postimg.cc/06xZ7pP0

          • By userbinator 2025-11-196:13

            Or worse, they're accustomed to "automatic" lights and don't even know where the switch is, so they're driving around at dusk or in fog, rain, or snow in a white, gray, or black vehicle without their lights on.

            The worst: automatic headlights required by regulations, but no corresponding automatic taillights. At least before those regulations one would notice the darkness in front and turn on (both) lights, but now you have drivers thinking their rear is also lit because the front is.

          • By fouc 2025-11-198:49

            I've long wished we had a standardized communication channel between cars. It could even be fixed status codes.

            I've always expected that in the future when all cars are fully self-driving, they would have some kind of communication channel to improve efficiency. Why can't we have this for humans too before that.

          • By gorgoiler 2025-11-1820:24

            12. YES I KNOW THIS IS A GAS STATION AND I COULD JUST WALK OVER AND TELL YOU BUT THIS SIGN THING I MADE IS WAY MORE FUN.

          • By nrds 2025-11-2015:39

            > BLUE MEANS BLINDING

            ONLY IF YOU'RE LIVING IN THE '90S! THE REST OF US HAVE MATRIX HEADLIGHTS! ALSO TURN OFF YOUR CRUISE CONTROL FOR COOL!

          • By Dylan16807 2025-11-1821:042 reply

            #3 sounds like you're either nitpicking or maybe having an eye issue?

            #7 You're either doing something good or something very bad, so I hope it's the former. If you're trying to pace the lane next to you, then it sounds like it's at least an honest attempt to get things zipper merging. If you're telling yourself that cars need to be in both lanes to zipper merge, while zooming to the end and then hoping maybe a zipper merge will happen, you're getting a big benefit to yourself while still causing slowdown for everyone else.

            • By randerson 2025-11-190:042 reply

              #3 Plenty of drivers have difficulty spotting a gray/silver/black car under low or high-contrast lighting. Highly visible colors (yellow, orange, white) have a 7-12% lower chance of getting into an accident during the day and up to 47% lower at dusk.[0] Keeping your headlights on at all times reduces this risk.

              #7 In many states (e.g. [1]) if two lanes are merging you're expected to merge at the last possible point. This allows more cars to fit on the road to reduce congestion, and it reduces sudden stops.

              [0] https://www.monash.edu/__data/assets/pdf_file/0007/216475/An...

              [1] https://wsdot.wa.gov/travel/traffic-safety-methods/work-zone...

              • By Dylan16807 2025-11-191:001 reply

                > #7 In many states (e.g. [1]) if two lanes are merging you're expected to merge at the last possible point. This allows more cars to fit on the road to reduce congestion, and it reduces sudden stops.

                Maintaining smooth merging is far more important than where the merging happens.

                The page you linked even says "It is legal to wait to merge until the lane closure devices (cones or barrels) start, but we recommend merging sooner than that to give more time to find a gap, complete the merge, and avoid getting in a pinch when the devices make the closed lane too narrow. Merging sooner also avoids the risk of hitting a closure device or ending up inside the work zone."

                It recommends zippering, but nowhere in there does it recommend waiting for "the last possible point".

                Someone that has it in their head that zippering is best and zippering needs to be done at the end is likely to cause more harm than good, even if they're working off the purest intentions. Keeping both lanes in use is a distant second priority to making sure the merge is smooth.

                • By fouc 2025-11-198:451 reply

                  By definition, zipper merge means late merge [0]. The problem is that if some cars merge too early, other cars will keep driving down the road and then merging in front of the early mergers, it ends up being disruptive in heavy traffic conditions. If everyone consistently merges at the same point in heavy traffic conditions it's more predictable, leading to better through flow.

                  [0] https://en.wikipedia.org/wiki/Merge_%28traffic%29#Late_merge

                  • By Dylan16807 2025-11-208:081 reply

                    > By definition, zipper merge means late merge

                    Tell that to the site linked above, because even though they say "like a zipper" they want it to happen early.

                    > The problem is that if some cars merge too early, other cars will keep driving down the road and then merging in front of the early mergers, it ends up being disruptive in heavy traffic conditions. If everyone consistently merges at the same point in heavy traffic conditions it's more predictable, leading to better through flow.

                    I don't blame the early mergers there. If someone zooms down the empty lane then they are not attempting to zipper merge, they are bad actors.

                    A proper zipper, at the last moment, is slightly better than early merging. But again smoothness is the important factor. Smoothness is 90% of the solution. Do not give up smoothness for the sake of being more zipper-y. If people think you're cutting in line, you probably are cutting in line.

                    -

                    Also, anywhere we want to make sure there's a zipper merge, how about we stop having a favored lane? Cut off half of each lane at the merge point.

                    • By fouc 2025-11-2013:53

                      > Cut off half of each lane at the merge point.

                      Good point, even in a situation that necessitates a favored lane, could still setup this half-of-each-lane merge point well in front of that.

              • By rob74 2025-11-1912:51

                #3 ...not to mention situations like fog, heavy rain/water spray etc.

            • By jaapz 2025-11-1822:09

              Regarding #3, in the EU it is normal to have lights on even when it's not dark. Some countries even mandate it. You're just more visible that way.

          • By sneak 2025-11-1819:513 reply

            You forgot THE LEFTMOST LANE IS FOR BRIEF PASSING, NOT DRIVING

            • By belorn 2025-11-190:181 reply

              The rule for the leftmost lane (highway) is that you must not block for other drivers. It is in the rule book (at least in my country). That mean in very clear terms that if you can't do the overtaking in a timely fashion without blocking other drivers, then you should not enter the left lane.

              If there is one thing that tend to cause conflict and trigger dangerous situations in traffic, it is when someone driving at 0.001% faster than the next car enter left lane while maintaining the exact same speed, basically matching the speed on the right. That is just as illegal as speeding.

              • By throw0101a 2025-11-1912:04

                > That mean in very clear terms that if you can't do the overtaking in a timely fashion without blocking other drivers, then you should not enter the left lane.

                And then there are the drivers who are in the centre/right lane who, when you try to pass on their left, speed up to try to prevent you from passing them.

            • By quadyeast 2025-11-1820:141 reply

              I'm often on highways were the left lane, for many miles, is the only one without potholes and broken road.

              • By pixl97 2025-11-1821:09

                Then when there's another person behind you, get over in the right and let them pass.

            • By Dylan16807 2025-11-1821:091 reply

              Eh. If there's a speed limit and the left lane is 5+ over it, what's the benefit of keeping it empty?

              • By scotty79 2025-11-1822:08

                If everybody left it, it wouldn't be going 5+ over limit and then it could serve the people who are serious about breaking the law and go big. ... Oh, wait...

        • By NietzscheanNull 2025-11-1818:43

          > I've been tempted to purchase digital billboard space to raise awareness.

          Ironically, digital billboards are often 10x more obnoxious than even LED high beams in my area (and those are plenty awful, FWIW). We've got a few nearby that are so bright they could be used as stadium lighting when they're set to white. Naturally, half the ads running on them feature a white background, so it's like a stadium light that flips on and off every 15 seconds. Considering they're pointed directly at drivers' faces, I genuinely don't understand why there isn't more opposition to them; they're absolutely blinding. I'm seriously considering bugging local and state reps about it until they pass light intensity ordinances in my area.

        • By japhyr 2025-11-1818:233 reply

          > Mostly I'm hoping that automatic high-beams, like some Ford trucks I've seen do well, proliferate more!

          I have a 2021 Tacoma, and its automatic high-beam adjustment is terrible. It does a reasonable job of turning high beams off when a car approaches, but it has a number of problems that make it unusable. After the car passes it waits too long to reactivate the high beams. That's when they're needed most; my eyes have already adjusted to the other car's headlights, now the road is dark again, and I'm still on low beams.

          It's way too sensitive. When a car approaches from a long ways away, it sometimes turns high beams off for minutes at a time. It turns them off when there are widely-spaced streetlights on long empty rural highways.

          I finally took the time to figure out where the switch is to turn off automatic high-beam adjustment. I do a much better job knowing when to dim and reactive the lights than the vehicle does.

          • By bespokedevelopr 2025-11-1822:19

            Maybe it’s an overcorrection because the Tacoma I had, a couple years older than yours, had auto high beams and they would just stay on all the time. They only turned off from reflecting on road signs or when a car was only a few lengths away approaching. Quickly found the button to disable that feature.

            The feature seems to be poorly implemented by all manufacturers. I see Teslas driving around flashing high beams every night because they trigger on/off really quickly and the drivers seem oblivious to the rapid change.

          • By GrinningFool 2025-11-1915:28

            > That's when they're needed most; my eyes have already adjusted to the other car's headlights

            On a purely practical note from someone who is very light-sensitive, a combination of partially closing the eye closest to the light and fixing your gaze on the the outer edge of your lane (such as lane marker or eode of road) almost eliminates this problem, even for modern stupid-bright headlights.

            Added benefit of letting you see more of your own lane in spite of the oncoming lights.

          • By VBprogrammer 2025-11-1820:271 reply

            I dunno, maybe where you live is a lot flatter than the roads that I drive on, but the instant I see a car coming the other way (ideally before they come into direct view) is the time to turn off full beams.

            Though from a game theory point of view, leaving them on for a couple of seconds is probably ideal to remind anyone who forgets to dim their own headlights.

            • By japhyr 2025-11-1820:381 reply

              I live near mountains, rolling hills, and lots of farmland. There are many stretches where you can see a car coming from a mile away, long before anyone's high beams are noticeable. But in that darkness, my truck picks up those headlights and dims the high beams.

              • By VBprogrammer 2025-11-1821:47

                Hmm, I mostly drive in the English countryside where most often there are hills and bends, bushes and trees, houses and hedgerows. Seeing another car a mile away would probably mean both are heading into a wide valley, in which case the geometry makes it less important.

                That said, I'm still not convinced your truck isn't doing the right thing. Even a mile a way you've got perhaps 30 seconds before you are passing each other. Is there much to be gained by leaving them on for a few more seconds? Seeing another car heading towards me is a much clearer and less likely to be forgotten trigger than "ok, about now my lights are probably getting annoying".

        • By gorgoiler 2025-11-1820:211 reply

          Automatic high beams only dip for other cars. They don’t dip for bicycles or pedestrians. Those walking or cycling by the road do not even register. Pure hubris.

          • By timthorn 2025-11-198:13

            They also don't dip in anticipation of a car coming round the corner, which humans can do fairly accurately.

        • By asdefghyk 2025-11-1819:431 reply

          RE ".... get a mirror on my trunk that I can adjust the angle of from inside the cabin to reflect back high-beams at the driver. ...." I had this idea too this annoyance too - but never implemented it.

          One way to implement would be to mount a thin object , like a toothpick thickness and 1 or 2 cm long say on the mirror 90 degrees vertically to mirror surface , then (auto? ) adjust so their is no shadow from car's headlights that is behind.

          Like lots of my other ideas , when i search for them , they already exist .maybe this one too

          Found similar ideas already exist for car rear view mirrors .... ie Google finds ... ".... auto-dimming rearview mirror automatically adjusts to reduce glare from incident light by using sensors and an electrochromic gel layer...." However my google of words "...auto adjust reflecting mirror to face incident light...." FInd there is much discussion on Faceboot and REddit for people asking for "...mirrors that reflect very bright high been lights BACK at the driver BEHIND ...: Could not find a implementation though ... Maybe it should be an Arduino project ....

          • By NickNameNick 2025-11-196:21

            You don't need electronics for that, just corner-cube reflectors.

        • By nrds 2025-11-2015:37

          > If this blue indicator is on, you're blinding everyone

          Your information is outdated. My Tesla with matrix headlights keeps the high-beam indicator on but oncoming drivers are not blinded.

        • By gblargg 2025-11-195:451 reply

          A big cause on older cars is haze on the clear plastic that develops over the years. This makes even low beams spread so they blind oncoming drivers. There are kits where you polish and re-finish them, and they do make a noticeable difference in beam directionality.

        • By Sohcahtoa82 2025-11-190:521 reply

          > I've been tempted to purchase digital billboard space to raise awareness. Eg., "If this blue indicator is on, you're blinding everyone".

          The thing is, IMO, there is a growing psychopathic trend of not giving a shit about other people. You can tell them "you're blinding everyone" and they will not care. They can see better, and the fact that you can't see at all as a consequence does not concern them. It's not their problem.

          • By rob74 2025-11-1912:54

            It could become their problem however if you are so blinded that you drive into them head-on. But yeah, I doubt they realize that, otherwise they wouldn't do it in the first place...

        • By rconti 2025-11-201:06

          The blue indicator is almost impossible to see on modern screens, vs the old one that blinded you from in between a couple of dim gauges.

        • By alvah 2025-11-193:04

          "If this blue indicator is on, you're blinding everyone"

          In many modern cars with auto-dipping headlights, this is not true (or at least not intended by the manufacturer to be true).

      • By hughes 2025-11-1817:124 reply

        Can confirm, my Model 3 had its lights angled too high from the factory. Only realized after a few people flashed their high beams at me during my first week driving.

        Thankfully it was easy to adjust.

        • By nehal3m 2025-11-1818:13

          I had the exact same issue, and Tesla sent out a service rep to my home to complete the adjustment to spec for free. You can request it through the service menu. Haven't had anyone flash me in the year since.

        • By hn_acc1 2025-11-1820:14

          Thank you for being part of the 0.01% of Tesla drivers who figured this out. I think by default they set them to "maximum height" or something. As someone in a sedan, they are infuriatingly blinding at night by default. I'm sure they're illegal, but obviously Tesla doesn't care.

          Source: live within a few miles of the Tesla factory, so I get more than my fair share of them. MOST of the drivers seem completely oblivious to this.

        • By desolate_muffin 2025-11-1817:44

          Thank you for your service

        • By compass_copium 2025-11-1817:20

          What a quality car manufacturer!

      • By lukeschlather 2025-11-1818:355 reply

        My parents' new Chevy Bolt automatically turns off the brights when appropriate. At first I was doing it manually but then I started trusting it, it just works, it does it at exactly the moment I would do it (actually it's better at it than me.) I'm surprised Teslas don't do it.

        • By pianom4n 2025-11-1819:572 reply

          You must never drive on a curvy roads then. Every car I driven waits until the approaching car is fully around the corner, blinding them for a full second before dimming, instead recognizing the headlights around the corner and dimming earlier.

          • By atombender 2025-11-1823:16

            Newer cars with matrix LED headlights account for this, such as the Volkswagen ID series. The brights not only "blot out" the shape of the cars around you, they also rotate when turning or going around a curve, so that you never accidentally point them at oncoming traffic.

            It's quite magical and weird to observe in real time. When driving past oncoming cars, you can see a halo of darkness around each car. There are videos on YouTube that show the effect pretty well.

          • By axus 2025-11-1820:16

            I don't even know what a Chevy Bolt looks like! Maybe the problem is every other model.

            It's not hard to know when a car is approaching from corners / hills; there's light before they get there. I have fun manually adjusting the brights; I drive automatic transmission, lighting is the only fun I get.

        • By giobox 2025-11-1819:251 reply

          All Teslas can do this too, as can a huge range of modern cars with so called "auto dipping headlights". Virtually all cars with this option allow you to turn it off though...

          The quality of the auto-dip implementation varies enormously as well.

          • By scotty79 2025-11-1822:10

            Yeah, and the ones that auto dip usually don't have auto off mode. To bad they didn't leave it in as an option.

        • By Wistar 2025-11-1818:58

          I am not sure that the incredibly bright Tesla Model 3 (and sometimes Model X) lights are on brights but are just stupidly bright at low-beam settings.

        • By MetaWhirledPeas 2025-11-1819:352 reply

          > I'm surprised Teslas don't do it.

          They do. Also, the ones with matrix LEDs (most newer Models other than the Cybertruck) automatically create a circle of darkness around anything they detect to be another vehicle.

          • By hnburnsy 2025-11-1914:54

            Yup it is amazing, it also focuses illumination on signs and maintains that focus as you drive towards them.

          • By LanceJones 2025-11-1820:39

            Why the downvotes? Jesus, I have a new Model 3 Performance and the matrix lights do exactly as stated.

        • By woods42 2025-11-1819:45

          ours does - and it does it very reliably as you describe the bolt above.

      • By SJC_Hacker 2025-11-1817:511 reply

        > I am not sure what the solution is but the situation is getting worse and quickly.

        Maybe Corey Hart had the right idea … sunglasses at night

        • By ToucanLoucan 2025-11-1818:24

          As someone who's undergone LASIK correction, I have to do this semi-regularly for night highway driving. (For those unaware, the procedure gives you a mild halo effect basically for life, if you've had your eyes dilated before, imagine that, at like 25%). LED headlights are BRUTAL for this, oftentimes I can't even see the car they're attached to because of the insane amount of glare.

      • By kulahan 2025-11-1817:263 reply

        I remember, when shopping for a car, the salesman told me about an Alpina model he had with laser headlights so intense they weren't even legal for new builds anymore. It's a selling point in some vehicles.

        Still, the idea that you should give headlight illumination control to the idiot behind the wheel is insane to me. Is it not a regulated height? Maybe that explains why it's a nightmare to drive at night anymore.

        • By sokoloff 2025-11-1817:361 reply

          Back when sensors, electronics, and servos were unaffordable or unavailable, it made sense to have a low beam height control as the resting pitch of your car could vary by several degrees based on passenger/cargo load, trailer tongue weight, etc.

          It seems vastly less necessary now to have that control in the hands of the driver.

          • By mulmen 2025-11-1818:051 reply

            My dad’s 1966 Oldsmobile has auto-dimming headlights. There are manual overrides of course.

            • By sokoloff 2025-11-1818:171 reply

              Does that relate to driver-controlled height adjustment of the headlights?

              • By mulmen 2025-11-1822:12

                No, the level is fixed for the high and low beams. I guess the driver can adjust them with a screwdriver but not while driving.

                I’m just mentioning that headlight automation was being done back in the 1960s with simple electronics. Just a photo cell and a lens. The driver can adjust sensitivity.

        • By stefan_ 2025-11-1819:351 reply

          Headlight regulation obviously stopped making any sense at all when they allowed bigger cars to put them up higher. Like you are gonna regulate all kind of beam parameters and then miss the most important thing.

          • By tmnvix 2025-11-1820:53

            Good point.

            Look at a large vehicle like a bus. The lights are mounted low. This should be how it is for all vehicles.

        • By trinix912 2025-11-1818:19

          Older cars have the height adjustment control too. Either as a physical dial or a menu entry. It's useful when transporting something heavy or when you're driving on totally wrecked roads so you can spot potholes faster etc. But most people don't know that, dial it all the way up and just leave it there.

      • By janaagaard 2025-11-1917:41

        > Lately, I see a lot of drivers who turn on their brights and just leave them on and this includes cars with the older halogen and even incandescents. This is a change in behavior.

        I suspect this is because more and more people don’t know how to turn it off and/or don’t know what the blue indicator on the dashboard means.

        As you mention, Tesla model 3 seems to be the worst offender. Could this be caused by a bad interface in that car? How does the brights indicator look in a model 3 and you turn off the brights?

      • By gleenn 2025-11-1820:07

        I found out recently that you can adjust your Tesla headlights electronically from the computer screen inside and it was quite easy. I was regularly getting high-beam flashed by people because I think the stock Tesla settings have the lights too high.

      • By rconti 2025-11-201:05

        > I suspect that the Model 3 headlights are often maladjusted as they have a user/driver-accessible headlight aiming menu and it looks to me like a lot of Tesla owners get in to that menu and do some freelance aiming.

        There's just no way that more than 0.5% of drivers of any model are going to this level of tinkering. I have a Model 3, and I've never seen that menu. And I post here!

        One contributing factor to people noticing "the blue light means you're blinding people" is that it's just a blue light outline on an already blinding white dash screen (and in the case of the tesla, an OFFSET dash screen).

        "Back in my day", the blue high beam light was the brightest damn thing on the cluster, so you KNEW when your brights were on. Now you have to _look_ for the indicator.

      • By amy_petrik 2025-11-190:561 reply

        > This is a change in behavior.

        I agree with this and believe it due to something parallel to the India litter crisis. In india people may freely throw garbage anywhere. Because garbage is everywhere. They did studies "clean up ALL garbage on this street" and now people are more respectful. So there is a sense "garbage is everywhere, who cares if I add to it"

        The same thing with headlights, "everyone seems to be blasting their headlights, might as well" - it's a slippery slope. Kind of like if a workplace reaches a crucial saturation of assholes, everyone is tempted to become an asshole and it becomes toxic. All of this, some facet of human nature I suppose.

        My suggestion would be steep fines for excessively bright headlights with some significant portion of those fines funding police departments. This would yield rapid and effective enforcement.

      • By vkou 2025-11-1818:52

        > Lately, I see a lot of drivers who turn on their brights and just leave them on and this includes cars with the older halogen and even incandescents. This is a change in behavior.

        I mean, the reptile part of my brain is really tempted to do so, because every other car on the road is blinding me - why be a good citizen, it's all fucking Mad Max out there anyways...

        (On odd-numbered days, that part of my brain compels me to go through the mall parking lot and spray a filter onto all the offending vehicles' headlights.)

        The issue is that the giga-bright headlights would be fine if they were pointed at the road, instead of onto oncoming traffic. And some people have them incorrectly adjusted, where they do point onto incoming traffic.

        However, even if they were correctly adjusted, the slightest bump or angle in a road will still result in them shining directly into my face.

        The only acceptable solution is to send all offending vehicles to the junkyard, tomorrow. If that's not palatable, I'll settle with funding a a Department of Highway Safety making the rounds of the parking lots with a hammer.

      • By shit_game 2025-11-1817:192 reply

        >This is a change in behavior.

        >I am not sure what the solution is but the situation is getting worse and quickly.

        The solution is legislation and enforcement. Driving at night now makes me afraid for my safety because I'm literally blinded by oncoming traffic, and I'm sure that many other people share the same sentiment. I would happily argue that driving with lights bright enough to impair other drivers counts as wreckless driving and ought to be treated as such, but as far as I can tell, there are no legislative limits on directional lumen output or directional calibration for front-facing lights on cars, which leaves "wreckless" open to interpretation. This issue requires legislation that affects car manufacturers to prevent them from putting dangerous lights in their cars, and legislation that requires regular inspection of cars regarding their lumen output and headlight calibration. Most US states already require yearly inspections for emissions for most cars in order to re-register them; there are already means and methods in place for this to happen, it just needs to be done.

        I'm sick of feeling like im going to die every time I drive home because some asshole wants to see everything a mile in front of him.

        • By Wistar 2025-11-1817:303 reply

          Adaptive headlights that actively shield oncoming drivers were finally made legal in the US in 2022 but complicated bureaucratic hoops make them hard to implement. BMW seems to have them working as I find their higher-end lighting (ex: ICON Adaptive w/ Laser Light) to be among the best to oncoming drivers—at least to my eyes.

          CNN writes about why headlight brightness is worse in the US than in other countries:

          https://edition.cnn.com/2024/02/15/cars/headlights-tech-adap...

          • By Zak 2025-11-1817:422 reply

            The USA seems to suffer from a not-invented-here problem when it comes to automotive regulations. Most of the world adopted the European standard for adaptive headlights, but the USA had to spend years coming up with its own incompatible standard.

            • By gmueckl 2025-11-1817:51

              It's not a bug, it's a feature? US manufacturers are not widely known for technological innovations. Deviating standards are a way to keep them competitive in their domestic market.

            • By stefan_ 2025-11-1819:10

              There is a reason US school buses look like WW2 troop transport and the long haul trucks are museum pieces in all aspects. It's not even NIH, it's just protectionism.

          • By andrewaylett 2025-11-1920:33

            BMW have one of the more annoying matrix main beam setups, as far as I'm concerned -- it's not great at picking out my car, and seems worse than others I've encountered. A redeeming feature is that it does seem to be smart enough to stop blinding me if I flash my own main beams.

            The (2017) Ford Galaxy has actually pretty decent auto-main-beams. Importantly, the stalk controls don't stop working but also if I'm just a fraction of a second late in turning them off manually and the system beats me to it, they stay off. They also stay off when driving on roads with street lights.

          • By Espressosaurus 2025-11-1817:561 reply

            It's solving the wrong problem, and doesn't help the typical situation of being on hills, pedestrians, bicyclists, etc.

            Just turn the damn maximum output down.

            • By VBprogrammer 2025-11-1820:361 reply

              I have a car with LED lights. It's easily the best car I've had for vision at night. We very occasionally get someone flashing us at night, wrongly believing our high beams are on.

              However, from a safety point of view, I'm not convinced the trade off is actually in favour of reducing illumination for everyone.

              • By duskdozer 2025-11-198:291 reply

                If I flash a car, it means they're blinding me. I don't care if it's their high beams or not. It doesn't matter.

                • By VBprogrammer 2025-11-1911:551 reply

                  No one is truly blinding you. Even old incandescent headlights can be unpleasant. Some people are more sensitive to it than others and things like a car coming over a slight hill or bend in the adverse direction can change the alignment of the lights in such a way that they appear much brighter.

                  The point I was trying to make is that reducing the brightness isn't a simple trade off. How many accidents are caused by people being "blinded" vs people not seeing something until it was too late?

                  If it needs regulation to fix then that regulation should try to balance those things. Perhaps by automatically adjusting the headlights when another car is detected (maybe matrix style headlights, or a simple angle adjustment).

                  • By Espressosaurus 2025-11-1916:54

                    That's still ignoring the impact on bicyclists, pedestrians, and cars it can't detect because it's not a spherical cow on a uniform plane.

                    Look at the output of a car from 10 years ago, 20 years ago, and 30 years ago compared to today.

                    Each is progressively dimmer with their low beams. Modern low beams are brighter than the high-beams of yesteryear!

        • By LeifCarrotson 2025-11-1818:05

          It's "reckless", not "wreckless". Recklessness is often correlated with wreck-fullness.

      • By SlightlyLeftPad 2025-11-193:31

        It’s not that people are doing this intentionally, it’s that the aiming is that bad out of the factory.

      • By supportengineer 2025-11-1819:58

        To raise awareness I've started turning on my high beams when I encounter one of those drivers.

      • By dreamcompiler 2025-11-1821:231 reply

        The Tesla Model Y automatic dimmer is quite stupid. It dims whenever my lights reflect off a street sign and no other cars are nearby. I have to keep it turned off and dim my lights manually, which is a PITA because sometimes I forget and blind oncoming drivers.

        The automatic wipers are even worse: They frequently come on when it's not raining and they don't come on when it is. Yet somehow the automatic wipers on my 2011 Audi work perfectly. WTF?

        • By jfim 2025-11-1823:35

          The automatic wipers on non Tesla cars use infrared sensors that have existed for decades, so they're a well known quantity. The Tesla wipers use the front cameras to detect rain, and those cameras are focused at a distance that's far enough to be able to see other vehicles, so they're not focused on the windshield, which is why they're unreliable.

      • By dbg31415 2025-11-1817:47

        > Lately, I see a lot of drivers who turn on their brights and just leave them on and this includes cars with the older halogen and even incandescents. This is a change in behavior.

        Something has changed in how we use headlights, and not for the better.

        Historically, drivers behaved very differently. When "brights" were actually rare and reserved for dark stretches of highway, you'd dim them the moment you saw another car approaching. Often that meant switching to low beams when the other vehicle was more than a thousand feet away. Courtesy and safety were the norm.

        The technology has come a long way. Early headlights in the 1880s burned oil or kerosene. Acetylene gas lamps followed, and electric lighting appeared in the early 1900s. For decades after 1940, U.S. regulations froze headlight design into a two-lamp, 7-inch sealed-beam configuration. That rule unintentionally limited improvements in beam shape and brightness. Only in the 1970s and 1980s did halogens and replaceable-bulb designs become widely permitted, which opened the door to much brighter and more varied systems.

        Then came the xenon era in the late 1990s and early 2000s. High-Intensity Discharge (HID) lamps felt futuristic at the time, but they were also infamous for their glare, especially when installed into housings not designed for them. This is where "riced-out" aftermarket kits made things worse. People would drop cheap HID or later LED bulbs into reflector housings built for halogen. The result was scattered, unfocused light that looked bright from the driver's seat but created a wall of glare for everyone else. That trend never fully went away.

        Today, Federal Motor Vehicle Safety Standard 108 (FMVSS 108) governs headlamps. It sets minimum performance requirements and basic definitions for high and low beams, but it does not impose strict limits on maximum brightness or color temperature. The old "300 candlepower requires a dimmer switch" phrasing still floats around, but there is no tight federal cap on lumens or color warmth. States can enforce aiming requirements, but in practice they rarely do. Nobody is pulling cars over with a light meter.

        Modern LEDs changed the equation again. They're efficient, crisp, and extremely "white" (actually "blue") which makes them appear even brighter to human eyes at night. Complaints about perceived glare have been climbing for years, and there's no shortage of real-world examples of it in the wild. https://old.reddit.com/r/fuckyourheadlights/

        Automakers tried to help with automatic high-beam systems, but these were designed to detect oncoming headlamps, not pedestrians. If you're walking your dogs at night, the system may not dim because it "sees" nothing to react to. Many drivers rely on auto mode and never manually intervene, so they cruise around blasting full brightness without realizing it.

        My workaround is simple. I carry a high-power flashlight and give a quick shine toward cars running high beams. The auto-dimmer interprets it as another vehicle and drops to low beam. It also alerts the driver that something is off. Plenty of neighbors have told me they had no idea their headlights weren't dimming. (Teslas are by far the worst offenders.)

        This is the flashlight I use:

        https://www.costco.ca/infinity-x1-7000-lumen-flashlight.prod...

      • By ishtanbul 2025-11-194:36

        What do you expect to happen with self driving cars? Do they need bright headlights? Do they need high beams?

      • By kevin_thibedeau 2025-11-192:231 reply

        I would bet that many of these are illegal LED mods without the required cutoff line in approved lighting.

        • By Wistar 2025-11-1920:32

          5 years ago, I would have agreed with you but not today. Just too many of them to all be user-modified/augmented lights.

      • By LoganDark 2025-11-1816:566 reply

        I usually drive with only the DRLs even at night. My vision is good enough that there's no reason to blind other drivers. I only use the beams at all when there's bad weather that fucks with visibility, or when the road has no retroreflectors. Also ever since a collision repair the headlight beams have been misaligned and that's extremely distracting/infuriating so I hate using them anyway.

        • By xxpor 2025-11-1816:572 reply

          At least in NA, if you only have the DRLs on, it means your rear lights aren't on.

          • By snerbles 2025-11-1817:47

            Anecdata around SV: I've seen an uptick in urban night drivers with only their DRLs and no tail lights.

          • By LoganDark 2025-11-1816:592 reply

            That's not true for my vehicle, I've checked.

            • By SoftTalker 2025-11-1818:17

              Not sure why people are not believing you. I have a Volvo and the headlights and taillights are illuminated at all times, even when the headlight switch is "off."

              The only thing that turning the headlights "on" does differently is enable high beams.

            • By hn_acc1 2025-11-1820:19

              Thanks - I'm ok with that. As also mentioned, I'm NOT when it's a dark car at night with ONLY DRL and no rear lights at all - which I've seen a LOT of lately..

        • By akersten 2025-11-1817:292 reply

          Are you aware of what the D in DRL stands for?

          Your vision may be good enough to see ahead of you by candlelight, but other drivers are not going to expect a nearly invisible car approaching at night. Turn on your headlights.

          • By LoganDark 2025-11-1822:30

            I don't know what's invisible about the outside edge of my headlights, and my taillights, being illuminated. The car is very visible. If it were invisible, and I do a LOT of nighttime driving, I would've gotten pulled over for it already (and I haven't been).

          • By BenjiWiebe 2025-11-1818:591 reply

            DRL's aren't dim enough to make your car "nearly invisible". If it's enough light for the driver to see the road via reflection, it's more than enough for the oncoming driver to see via line of sight transmission.

            • By hn_acc1 2025-11-1820:20

              True - but the problem is at night, from behind, on many models, the ARE invisible because no lights are on.

        • By mmmlinux 2025-11-1916:46

          Sounds like you had a bad repair then. take it back and get it fixed properly.

        • By sokoloff 2025-11-1817:391 reply

          On many cars, the beam of the DRLs are more offensive to oncoming drivers when used at night.

          Properly repairing your car might make it less distracting/infuriating.

          • By saltcured 2025-11-1818:291 reply

            Yeah, the DRL lamps are omnidirectional while proper headlights are much more directional.

            Typically the DRL lamps switch off or go to a dimmer setting when the headlights are on.

            That omnidirectional nature makes them pure glare at night.

            • By LoganDark 2025-11-1822:39

              My vehicle does not dim the DRLs with the beams on. The brightness of the DRLs is also inoffensive enough that I don't think they're worse than the beams at all. They're also essentially evenly-lit light bars, and not point sources like the beams, which further helps.

        • By officeplant 2025-11-1820:27

          > headlight beams have been misaligned and that's extremely distracting/infuriating so I hate using them anyway

          One might consider taking the 5 minutes to align your headlights? Even if you're alone and don't have a helping friend with a tape measure it's not difficult to just make them a little more properly adjusted.

        • By buildsjets 2025-11-1817:45

          Username checks.

    • By bob1029 2025-11-1815:233 reply

      > Older cars had dim green lighting for the gauges and even had a knob to adjust the brightness up and down.

      https://www.youtube.com/watch?v=Xgh2zbifn7E

      • By boldlybold 2025-11-1816:394 reply

        I knew before clicking this was going to be a Saab, I miss mine!

        • By Sparkle-san 2025-11-1818:191 reply

          Saab also had a feature where it would turn off all the lights in the instrument panel, but you could turn them back on by hitting the top of the dash. Might be a Swedish thing as Volvo had it too.

        • By potato3732842 2025-11-1817:141 reply

          Many if not most cars had green gauges in the 80s and 90s. They all had some sort of knob, wheel or other adjustment.

          • By procaryote 2025-11-1818:251 reply

            Saab went further though and just light up the relevant instruments. If you're good on fuel, it remains dark etc.

            • By calvinmorrison 2025-11-190:19

              Saab also had a battery warning light, like most cars. However, if the battery was not charging, the light would not come on. Also if the bulb burned out, your alternator wouldn't work.

              My saabs, of the 5 I own, only have working lights in about 2 of them. One has no tacho (from factory), one no speedo (broken)

              Turns out you pretty much dont need any of that stuff anyway.

        • By wildzzz 2025-11-1819:15

          Saab loved to talk about their fighter jets in their car marketing.

        • By jjtheblunt 2025-11-1816:46

          i miss mine too!

      • By marcosdumay 2025-11-1815:57

        That's a nice feature, but the driver actively operating that camera at 70 mph is quite unsettling.

      • By njarboe 2025-11-1822:22

        The low green glow in the 65 mustang I drove in high school was divine.

    • By jiveturkey 2025-11-1818:59

      You're retconning. Brighter headlights (xenon) were invented in '61 and first appeared in '91. By 2000 the tech made its way to less premium cars.

      Tesla didn't have the big screen (which heralded the current stupid trend) until 2012, and of course it took a number of years for Tesla and the giant omni screen to be popular. Thumb in the air I'd say 2018-2020.

      You want brighter headlights so you can see better and drive more safely. The interior brightness is a separate independently evolved problem.

      The horizontal cutoff is a tradeoff that comes with the bright lights (Xenon tech anyway). And there is plenty of low light leakage to reflect off of animal eyes. The problem IMO isn't pure brightness but rather these intensely bright lights (itself a benefit) coupled with poor aiming or poor maintenance of aim. Some states in the US have a mandatory annual vehicle inspection which includes headlight aim checks.

    • By the__alchemist 2025-11-1816:382 reply

      The car I'm driving now (2016 BMW) is the only car I've driven or been in that has appropriate interior lighting. E.g. You can really crank the brightness down, and the display lights are all red.

      • By hurricanepootis 2025-11-1917:37

        I love this era of BMW interiors. The warm glow of the red lights from the dash cluster is really cool and nostalgic.

      • By moogly 2025-11-1818:12

        Same with the brightness in my MY2025 BMW iX1. You can even turn the main screen completely off from the swipe-down menu.

    • By creer 2025-11-1818:483 reply

      In my past few rentals, the dial still acts on the driver's gauges - but not on the "entertainment / navigation" screen which remains too bright no matter what! In one, the automatic "night mode" was still crazy bright and independant from the dashboard brightness dial. Absurd indeed.

      • By hexbin010 2025-11-195:45

        Exactly the same with my Ford. It seemed explicitly designed to be too bright and hard to adjust

        It's another example of a company not considering the effects of their actions

      • By mikkupikku 2025-11-1819:09

        In my Mazda, turning on the headlights enables a night mode in the both the instrument panel and stereo/etc screen, dimming everything. Which seems like a nice touch, but if I want to run with my headlights on during the day, as seems to be fairly customary these days, that means I can't read my clock. Not great.

      • By wildzzz 2025-11-1819:12

        My 2006 car had an independent brightness setting for the infotainment screen but that's likely because the infotainment system just wasn't as fully integrated into the car as it is today. It wasn't a touchscreen so since everything had a button, you could have easily designed it to use a VFD or similar.

    • By gehwartzen 2025-11-1820:30

      I physically desoldered and replaced the very bright 6500k interior overhead LEDs in my VW with much warmer units. It makes a huge difference when turning them on for a second and not killing my night vision. Also just much more pleasant and natural light in my opinion.

      https://www.reddit.com/r/Tiguan/comments/1hq2hae/changed_ove...

    • By stinkbeetle 2025-11-191:15

      I drive an old car with dull yellow headlights and a dull green glow from the analog instruments, just the way I like it. I was recently driving around a hire car that had this enormous screen that became blindingly bright after sunset on unlit carriageway. I couldn't believe how terrible it was. The whole thing was a pile of unintuitive garbage, but the screen brightness was egregious. I had to pull over and spend minutes navigating through a maze of menus to turn the thing down... I might have even had to google for how to do it. Then of course when I turned the car off later and started it again, the brightness setting was back to "surface of the sun".

    • By LTL_FTC 2025-11-1818:351 reply

      Absolutely. People just crank up the brightness on the inside lights because "blinky lights" but I have also noticed that, modern cars typically include fog lights which used to be a luxury or premium option, many people just drive around with these lights on as well. Fog lights are illuminating the area closer to the vehicle and therefore inhibit one's visibility further down the road. So now we get super bright vehicles coming at us, inhibiting our ability to see.

      Don't get me started on lifted vehicles and their lights...Dept. of transportation needs to figure out a way to enforce a standard height for headlights from all vehicle shapes and heights. Driving after dark is getting more and more dangerous, not less.

      • By cogman10 2025-11-1820:092 reply

        Trucks are the absolute worst vehicles on the road. Their giant ass lights blind anyone near their vehicles. A number of truck owners, especially the ones that lift their vehicles, will additionally add light bars to the exterior which are so incredibly dangerous.

        We don't just need DOTs to set regulations on these things, we need cops to actually write tickets for this behavior and for judges to get confirmation that these after market modifications are removed.

        • By mrguyorama 2025-11-1920:41

          The problem is largely that the same Cops who should be writing the tickets are the very people putting criminal light bars on their lifted pavement princess trucks.

        • By gopher2000 2025-11-1823:441 reply

          Have a truck with a light bar. But it's for offroad use only. I'd never drive with it on regular roads with traffic around me.

          • By cogman10 2025-11-191:21

            I just got done with a trip. Unfortunately there's a number of numb-nuts who don't see the problem with driving on regular roads with their lightbars on.

    • By omnee 2025-11-1820:001 reply

      I have an older car with the low light gauges, and so my eyes are more adjusted the darkness. Which makes the poorly calibrated bright lights of newer cars the bane of my life at night.

      • By alentred 2025-11-1820:181 reply

        Exactly. Even if my eyes adjust well to the relative darkness with my lights, the effect is erased the instant I encounter a car coming on me on the opposite side of the road.

        • By njarboe 2025-11-1822:18

          One thing that helps is to make sure you don't look at the headlights directly. It really helps to look at the white line on the side of the road when the other car is close to preserve your night vision.

    • By arghwhat 2025-11-198:24

      I think the "horizontal cutoff style" you're referring to is the American DOT beam pattern (two horizontal lines at different height) as opposed to the European ECE beam pattern (which goes up towards the edge of the road to illuminate signs and such). I would assume this follows the normal regional model variations, although Tesla seems to have notoriously misaligned headlights - some suggest it's a bug causing it to reset occasionally?

      The screens are a good point, but nothing about LED headlights require a single bright point. That's done for style and cost saving - old reflector headlights had to be big, so small looks "modern", and small means less material.

      Cramming it all into one tiny spot just means cooking the LEDs, which are much better suited for either larger lens assemblies or multiple smaller lens assemblies to distribute the load, both of which increase the size of the light source and massively decrease the blinding and glare it causes. You could easily cut the glare to, idk, a quarter by just changing the geometry a bit while maintaining the same light output.

    • By RajT88 2025-11-1819:45

      YES! I rented a Prius once, and this was my biggest complaint.

      That big stupid bright-ass LCD screen which smugly ruined my night blindness by trumpeting constantly how fuel efficient it was made me feel less confident driving at night. Toyota is a smart and good company, and seems to have addressed this in newer Priuses (Prii?) by putting smaller, less bright LCD's and moving them further out of the way of your field of vision.

    • By DoomDestroyer 2025-11-1823:20

      I have an old Landrover and there is no lights except for the dials. Visibility to the outside is excellent. Some newer cars allow you to dim the info console and the some of the instruments but they cannot be seen in the day light.

      People say the headlamps on my model of Landrover is too low. But I had good visibility at night driving down country roads. The side lights are useless though.

    • By groos 2025-11-1822:14

      > I'm happy my Tesla does a decent job of having the screen be quite dark at night but the headlights are quite bad with the horizontal cutoff style that only lights the first few feet of horizontal ahead of the car. I need to see those deer and elk on the side of the road, damn it.

      Turn on your fog lights? At least in my 2018 M3, they illuminate the sides as well.

    • By haspok 2025-11-1816:193 reply

      > huge amount of white light you get with modern cars

      Maybe this is missing from your Tesla, but in my poor VW the "screen" has a dark mode which is automatically turned on when the lights are turned on - including Android Auto and Google Maps, which is pretty much the only thing I ever use it for.

      Previously I had a rusty Toyota with a very pale orange display, it was always either too dim or too bright, terrible contrast, and changing brightness on it was a pain. I hated that with a passion.

      • By thebruce87m 2025-11-1817:09

        > Maybe this is missing from your Tesla, but in my poor VW the "screen" has a dark mode which is automatically turned on when the lights are turned on - including Android Auto and Google Maps, which is pretty much the only thing I ever use it for.

        Tesla seems to do dark mode on sun rise / sun set.

        Doing it with the lights seems like a strange decision - sometimes I want my lights on when it’s bright - e.g. fog, rain or when the sun is low and I want others to see me.

      • By _will_ 2025-11-1917:58

        It's worse than that ... It has an "auto dark mode", but in my opinion, doesn't get dark enough by default. I like my screens very dark at night. Admittedly darker than most. When using the "self driving" mode, my former model 3 thought the screen was too dark and any time it was engaged, actually INCREASED the screen brightness from my setting to a level I felt was uncomfortable and inhibiting night vision. I'd manually crank it back down again (via several distracting menus and steps) and it would stay at that level until the next time self driving was activated.

        I made a complaint about it to the service department and was told that it was intentional so that the internal camera could see me better to ensure compliance with my eyes looking at the road. That might be true, but since I could still manually turn the brightness down after starting self drive and self drive would continue, it's obviously not required and there should be some way to disable it.

      • By njarboe 2025-11-1822:20

        My Tesla does a good job with its screen and since it is a model 3, no bright gages in front of the wheel. Most other modern cars have this problem though.

    • By apparent 2025-11-1817:342 reply

      My car's screen switches to night mode when it's dark, but if you want to make it the darkest setting, you have to manually adjust it, every single time. I don't know why there isn't a persistent setting for [when the car is in night mode]. I frequently have to adjust this because I want my eyes to adjust to the exterior darkness for safety reasons.

      • By wildzzz 2025-11-1819:07

        My 2006, 2017, and 2023 cars all will autodim the screens at night. Except for the 2006 model, the brightness knob adjusts both the instrument cluster and the screen brightness and stays where you leave it. The 2006 car had a separate up/down button for the screen.

      • By ratdragon 2025-11-1818:17

        they definitely were persistent before

        edit spelling

    • By zzyzxd 2025-11-1817:271 reply

      Teslas are the worst offenders in my area. I don't own one but I looked up online out of curiosity, and saw many owners complained because they got flashed a lot. Turned out the factory settings for the headlight angle was too high. They went to the menu and adjust the angle down by "2-3 clicks" and they reported never got flashed again.

      • By hn_acc1 2025-11-1820:211 reply

        This 100x. I get blinded by Teslas more often than all other brands combined.

        • By thallium205 2025-11-1823:35

          Teslas always want the road to be as bright as possible for their self driving tech to work well.

    • By 1970-01-01 2025-11-1816:421 reply

      You're cherry-picking here. Analog gauges were lit with both filtered and unfiltered incandescent bulbs. There was no standard.

      • By ErroneousBosh 2025-11-1817:171 reply

        There was a mix of technologies. Up to about the early 80s, instruments were lit by an "unfiltered" incandescent lamp at the back of the instrument housing, that reflected off a band of white paint around the top of the housing and screened by the bezel, like old Smiths gauges. After about that point they moved over to edge-lit screen-printed perspex backings, and continued that way until the current trend for glarey and unpleasant LCDs everywhere.

        • By paradox460 2025-11-1820:36

          My old Ford Windstar used electroluminescent panels behind the dash cluster. Gave everything a beautiful soft green hue

    • By Ferret7446 2025-11-192:53

      > horizontal cutoff style that only lights the first few feet of horizontal ahead of the car. I need to see those deer and elk on the side of the road, damn it.

      I believe this is intentional to avoid blinding oncoming traffic and pedestrians

    • By NoSalt 2025-11-1821:37

      My Subaru Outback lets me adjust the dashboard and display lights down, which I do whenever I am driving at night. It's amazing how much more you can see without a ton of lights in the cab.

    • By BeFlatXIII 2025-11-198:43

      Adding to this: on rainy nights, crazy amounts of glare off the wet pavement from streetlights. It would be safer if the lights were off for headlights only.

    • By bbarnett 2025-11-1820:39

      I actually keep an old tshirt in my car, to cover up the screen when on long rural drives.

      I can drive all night long with no strain or issue, unless I have a flashlight glaring in my eyes.

    • By King-Aaron 2025-11-190:31

      Do the Teslas use OLED etc screens that go to nearly complete darkness when the pixels are black? Or does it still have a constant LED glow?

    • By egorfine 2025-11-1910:491 reply

      Dark knobs won't sell cars, while bright shiny screens will.

      • By sobjornstad 2025-11-1913:20

        Do people normally test-drive cars in the dark?

    • By Marsymars 2025-11-1816:32

      My 2025 car (Ford) still has buttons for adjusting the brightness up/down.

    • By shevy-java 2025-11-1817:11

      > I'm happy my Tesla

      I'd never give my money to the mass-fire-people-at-DOGE billionaire.

      What I did, however had, notice, is that people are a LOT more easily distracted these days. Smartphones play a big role, but I also think something changed in the brain. This may be better or worse, but it definitely is very different now from, say, the 1980s. It almost feels as if humans are now +100 years different from the people in the 1980s rather than +40 or +50.

    • By giancarlostoro 2025-11-1818:47

      I miss my 99 Ford Explorer Sport.

  • By vegancap 2025-11-1815:384 reply

    I was at a junction the other day, there was some new Audi EV at the other side of the junction and I couldn't see a damn thing. I've got perfect 20/20 vision, never had any form of eye problem ever in my life, and I was completely blinded. I'm convinced if they'd turned the full beams on, I'd have disintegrated.

    • By _fat_santa 2025-11-1815:434 reply

      Part of the problem I've identified are SUV's and Trucks. Back home I drive a 4runner so I never noticed this but on vacation one week and we rented a Corolla. While the lights from other cars never bothered me in the 4runner, it was so apparent in the smaller Corolla.

      I would see light behind me and go "why do they have high beams on" but then looking ahead it didn't look like they had their high beams on, I was just in a short car.

      • By robertlagrant 2025-11-1816:362 reply

        > but then looking ahead it didn't look like they had their high beams on, I was just in a short car.

        You were in a normal car, and the SUV manufacturer has mounted the lights higher just for aesthetic reasons.

        • By switchbak 2025-11-1821:031 reply

          You were in a normal car ... for 2004.

          Now you're in a car that the US car industry doesn't want to sell, and thus you don't exist.

          Do we need self-darkening HUDs? Like an LCD overlay that specifically mutes the intensity of these improperly engineered cars? Seems dumb, but it might happen.

          I wonder if we'll just move to using IR for the really high beams? That probably doesn't do anything good to the human eye at high intensities, but if you could augment the driver's vision and not blind everyone at the same time that would be nice? Let's bring back the Cadillac Deville!

          • By robertlagrant 2025-11-199:17

            Some high-end cars use banks of lights all pointing in slightly different directions, and they autodim the lights pointing directly at headlights coming the other way.

            EDIT - also:

            > Now you're in a car that the US car industry doesn't want to sell, and thus you don't exist.

            To be fair, this is related to the cars people want to buy. Everyone's making SUVs because they sell like hot cakes.

        • By adolph 2025-11-1817:112 reply

          Seems like it would make sense to mandate a specific height for headlamps. I wonder why this hasn’t been done.

          • By toast0 2025-11-1817:281 reply

            Edit: sorry, I shouldn't post US rules on a UK topic. For penance, a fact about lighting in the UK, reverse lights weren't required until 2009!

            There are rules. FMVSS [1] says lower beam headlamps must be mounted between 55.9 cm and 137.2 cm above the ground, and upper beam headlamps must be mounted not less than 22 inches nor more than 54 inches. The height ranges match, but are specified in different units

            But that's a big range.

            These rules end up being the stick used to regulate vehicle lifts and lowering; you could lift a vehicle higher, or drop it lower but very few people will do the work to relocate the lights.

            [1] https://www.ecfr.gov/current/title-49/subtitle-B/chapter-V/p... Table 1-A, seach in page for 'Expand Table' cause I couldn't find a good way to navigate.

            • By eldaisfish 2025-11-1818:381 reply

              this is also my understanding. The range is large because it caters to passenger cars, lorries and construction equipment. Construction equipment is seen are more rugged (it often is) and this is now projected as a desirable trait for SUVs and pickup trucks.

              The irony is that SUVs and pickup trucks do not need lights 137 cm above ground, but that height is perfectly legal in too many countries. These vehicles are a menace and should be legislated out of existence.

              • By toast0 2025-11-1819:001 reply

                I will always champion the compact pickup truck. A 1980s S-10 or Toyota Truck (HiLux) can do light truck things, is relatively economical, and doesn't have a large footprint. Alas, nobody makes similar vehicles for US/Europe anymore --- kei trucks are still made for Japan, and less developed economies can get simple small trucks. Maybe some of the EV compact trucks will actually be made.

                • By cogman10 2025-11-1820:141 reply

                  I'd argue that compact trucks should be the only trucks that can be driven without special licensing.

                  It's insane to me that I as a 16 year old was allowed to drive an F350 pulling a 40ft trailer on a standard license.

                  • By xp84 2025-11-1822:293 reply

                    Another one of those quirks of law that appears to be there to help avoid burdening the legendary smallholding farmer whose teenagers are hardworking farmhands towing around 8 head of cattle in the work truck, but which mostly just enables a bunch of idiots driving around surburbs in gleaming-clean four-door pickups that have never carried anything in the bed but a couple bikes or a little camping gear.

                    I'd be all for exemptions to any rules for anyone who proves ownership of a working farm or ranch but you can bet that no regulation of any kind will ever be enacted to curb the disaster that CAFE rules caused to "car" size.

                    • By cogman10 2025-11-1822:43

                      I came from exactly that sort of community. The fact of the matter is that teen would have driven that truck regardless of the law permitting it.

                      IMO, this sort of thing should work more like the way fair use works. A cop could pull you over for a traffic violation, ticket you, and then when you go to court you push the defense of "I'm a farmer and I was doing farm work" to get the missing license charge dropped (but you'll still likely end up with a traffic ticket to pay).

                      Generally speaking, cops aren't patrolling farming roads anyways so you'd really not need almost any exemption in place.

                    • By AngryData 2025-11-198:56

                      Farmer's kids are already exempt from 99% of road and licensing requirements if they are on farm business. I was 12 years old driving around in an old truck without a license plate or license, sometimes hauling massive loads, and it was 100% legal because it was for the farm and my parents were farmers. And honestly there were far more dangerous tasks done on the farm than that so I don't see a real problem with it.

                    • By toast0 2025-11-1823:282 reply

                      > you can bet that no regulation of any kind will ever be enacted to curb the disaster that CAFE rules caused to "car" size.

                      I'm not a big EV person, but afaik EVs don't have efficiency standards and so they don't have to conform to CAFE footprints, so we can get compact vehicles again, hopefully. Up to manufacturers to put them for sale, and people to actually buy them, of course.

                      • By xp84 2025-11-190:261 reply

                        Sure. But unfortunately the effect of stupid CAFE on the whole fleet nationwide has been so extreme that the 85% of cars that are still gas have grown to be enormous, so understandably no one feels safe driving a little Civic if they can afford at least a CR-V and ideally a 3-row SUV.

                        Plus, giant EVs have more room for batteries and most Americans think 300 miles of range is necessary even if they drive 20 miles a day and even if they can charge at home!

                        • By afiori 2025-11-1913:35

                          also people expect smaller cars to cost far less so they have far lower per-unit profits

                      • By adolph 2025-11-1916:111 reply

                        > but afaik EVs don't have efficiency standards

                        This is a huge hole in the regulatory regime. It doesn't make sense to be as wasteful with electrons as we are with hydrocarbons. Sure the electron can be generated cleanly or with higher efficiency, but that doesn't negate the pursuit of encouraging increased utility.

                        • By robertlagrant 2025-11-209:511 reply

                          Isn't this currently covered with range?

                          • By xp84 2025-11-2215:18

                            No? You can just make a 2 ton massive EV with a massive battery to get more range, ruining the roads more, using more resources to make that battery. Basically the Rivian model.

          • By rcstank 2025-11-1917:18

            It's not necessarily height. Angle of the lamp impacts things as well.

      • By vegancap 2025-11-1815:461 reply

        Yeah I'm in a really low Civic Type-R, so when I'm opposite some kind of SUV, and also at a slight angle, was basically at direct eye height with their LEDs. I definitely don't have the same problem with older bulb based SUVs though

        • By Tade0 2025-11-1816:52

          I do, because in my corner of the world, before the advent of self-leveling headlights people would adjust them to whatever height they wanted.

      • By eldaisfish 2025-11-1816:353 reply

        you weren't in a short car, you were in a normal car. Society really needs legislation around auto obesity. Cars are too big, too high, too heavy, all at despite being less practical than a station wagon from twenty years back.

        • By paddy_m 2025-11-1818:181 reply

          Blame the obama CAFE regulations that accounted for wheelbase and car volume, giving manufacturers lower fuel economy standards for larger cars. Then the CAFE standards that hold trucks/SUVs to a lower standard.

          The economically efficient way to get the fuel economy result would have been to increase gasoline taxes, but that's a non starter politically. Higher gas prices would allow people to choose to keep a cheap gas guzzling truck/car, buy a new more efficient and expensive car, or buy a new slightly more efficient slightly more expensive car. It would have been simpler though and given consumers more choice.

          • By lotsofpulp 2025-11-1819:102 reply

            While drastically higher gas prices would have been the proper solution, the CAFE standards did not incentivize people to buy larger/taller vehicles.

            People’s desire to sit higher up and be in large vehicles, which have always been more expensive than smaller, lower vehicles, is what causes them to be bought. And once a significant portion have them, it becomes safer to be in one yourself, further incentivizing their purchase.

            But 99% of the time, it’s just because people like the feeling of sitting higher up than others, and the ego boost from taking up more space. The simple evidence is the popularity of Suburbans/Sequoias/XC90s/etc over minivans, like Sienna/Odyssey. There is absolutely no functional benefit of the former over the latter, yet the former is more popular.

            • By pixl97 2025-11-1821:241 reply

              Minivans really did suck in comparison to most SUVs. The vast majority of them were underpowered, had electrical problem, and their insides fell apart rather quickly.

              • By lotsofpulp 2025-11-1821:371 reply

                I can't say I have experienced those issues between Odysseys and Siennas, but those are quality problems, nothing inherent to the concept of a minivan. I don't believe a minivan is or was underpowered for 99% of people's needs, especially to move family in a 1 hour radius.

                • By pixl97 2025-11-1823:031 reply

                  It's funny that you point out Japanese companies as the actually worthwhile minivans. You're not pointing out the shitwagons dumped out there by Ford, Dodge and Chevy that were the bulk of the market. I remember the Astrovans being especially bad. There was a lot of stumbling around by US makers switching over to things like fuel injections and electronic controls. A lot of this left some amount of consumer dislike to particular brand names. Then when you add that SUV/Crossovers started showing up when manufacturing of cars had improved greatly these new models were more apt to be considered quality it made a big difference.

                  • By lotsofpulp 2025-11-1823:09

                    What? I’m almost 40, and my whole life it has been common knowledge that American cars are of inferior quality compared to Japanese cars.

                    It makes no sense to buy a GM Suburban or Ford Expedition because you think a Stellantis Pacifica is low quality. The Japanese minivans have always been there for purchase, if you wanted a quality minivan.

                    People have been choosing to pay extra for bigger, taller cars because they want bigger, taller cars to signal ostentatious consumption, not any other reason. I’ve heard this direct from many, many people on why they chose an SUV or pickup truck over a minivan (though they will couch it in terms like “cool” or “sleek” or whatever).

            • By eldaisfish 2025-11-1918:411 reply

              i wonder if the incessant marketing from US auto companies had anything to do with this "desire". Why invest in more efficient engines, at lower profit margins, when you can convince your customers that their obese vehicles are all the protection they need.

              There are very few countries where pedestrial fatalities have continued to rise, and the US and Canada are two of them, driven in large part by auto obesity.

              You point to popularity, but I will mention that it is impossible to buy a sedan from US automakers today. The reason why is simple - profit. Larger cars are more profitable. When combined with incessant marketing that a pickup truck makes you more "manly", you can manufacture "desire" and "preference".

              • By lotsofpulp 2025-11-1919:20

                >but I will mention that it is impossible to buy a sedan from US automakers today

                Toyota/Honda/Subaru/Mazda/Tesla/Volkswagen manufacture sedans made in the US, that you can buy today. Not sure why it would make a difference where it is made anyway.

                If you wanted a lower priced sedan, you would choose from the 10+ great options, cheaper than a larger vehicle, and buy a sedan.

                Which means if you paid more for a larger/higher vehicle, it is because you wanted the larger/higher vehicle.

        • By Stranger43 2025-11-1817:22

          Well either that or completely privatize the infrastructure needed to operate those cars like multi-lane roads and parking lots with no mandatory minimums for road width and parking lot size.

        • By gopher2000 2025-11-1823:461 reply

          > you weren't in a short car, you were in a normal car

          What's normal can change. Today, 37% of used registrations in the US are sedans and about 18% of new registrations.

          • By eldaisfish 2025-11-1918:38

            yes, what is "normal" has been redefined to align with what is more profitable for the US auto companies. There is no real reason why most US drivers suddenly switched from sedans to large SUVs and bloody pickup trucks in the past 40 years. Except for profit.

      • By helterskelter 2025-11-1816:012 reply

        Honestly the worst offenders for shooting the lights right in your eyes are the Jeep Wranglers. I drive a work truck on occasion and the Jeeps are about the only vehicle that still get me looking for the fog line. High intensity lights are still really annoying though, and my eyes are probably 7-8ft off the ground.

        • By psunavy03 2025-11-1816:151 reply

          Wranglers are often lifted via the aftermarket, and I bet a lot of people who do that don't ever stop to consider whether the headlights need to be realigned after.

          • By helterskelter 2025-11-1817:06

            My experience has been all Wranglers unless they have aftermarket "eyelids". I think their stock lights have zero angle and just blast straight ahead without pointing towards the ground. Most high intensity lights tend to point at the ground so you don't usually get it straight into your eyes.

        • By BobaFloutist 2025-11-1816:28

          That's the worse for you driving a work truck. For people in shorter cars, the Wranglers might actually be above our sightlines, and the Dodge Ram tailgating us is among the worst.

    • By switchbak 2025-11-1821:012 reply

      I high-beamed one of them, then they turned their high beams on - it was a shockingly ridiculous amount of light that's simply dangerous anywhere. Fuck Audi.

      Man, this feels like a vehicular instantiation of class war. Pay enough and you too can blind others on the road.

      What's next - frickin laser beams?

    • By rootusrootus 2025-11-1816:05

      One thought I've had with the matrix projectors on my Lightning is that it would be nice if they were able to dim parts of the beam that were below the normal threshold for low/high. It reliably turns off the bright parts above that line, but it seems like the "low beam" area is fixed. So on small hills and such I'll occasionally beam people directly in the face with a lot of light. Mostly that happens when the distance is still far enough that it won't be nearly as bad as when you're just across an intersection, but it's still fairly bright IMO.

      I assume regulation prevents the dynamic lighting from including the low beam section.

    • By rafale 2025-11-1815:411 reply

      Maybe they were on a slight up slope. If the headlights were auto leveling it will fix many of the issues people complain about.

      • By vegancap 2025-11-1815:43

        Yeah quite possibly actually, I did think at the time if they were angled down slightly, it wouldn't be half as bad. So that checks out. But does show there needs to be some kind of solution for uneven situations like that

  • By whitehexagon 2025-11-1816:027 reply

    The curse of modern super bright LEDs. Add to that list; super bright red brake lights, and a new trend for animated turning lights / indicators. Looks like something we'd have installed as teenagers after watching Knight Rider. Really distracting.

    Some of the towns here also started scattering flashing LEDs over every road sign they can find. Some areas feel like driving through Blackpool Illuminations. The worst offender locally is a roundabout light that flashes blue, which of course you assume to be an emergency vehicle approaching.

    • By Y_Y 2025-11-1816:121 reply

      Add to that rental bikes that have always-on flashing lights. My neurospice is relatively mild, but flashing lights and animations in my field of view really fuck up my ability to focus on other things. I can't be the only one with this issue, but it doesn't seem to garner much sympathy.

      I still drive when I have to, but I had to give up watching soccer on tv when they added animated ads to all the pitches. I'm honestly considering some kind of AR filtering at this point.

      Also shoutouts to the places in South America (esp. Guayaquil) where people modify cars and buses to have constantly flashing lights, animated screens etc. It's like having a little Times Square in every traffic jam!

      https://www.youtube.com/watch?v=2LOdfcJpvps

      • By crazygringo 2025-11-1819:354 reply

        To be fair, the flashing on bicycles is intentional, precisely to make sure you are aware of them, since they're so much smaller and vulnerable, and the light itself is so much smaller than the rear light on a vehicle. It's not just on rentals, it's a standard feature of bicycle rear lights that is there for safety.

        • By martijnvds 2025-11-1819:562 reply

          In the Netherlands, bike lights _must not_ flash. The law very explicitly states that they need to be "always on" (in the dark).

          The main reason seems to be that it's hard for others to to gauge your speed when your lights are flashing.

          • By crazygringo 2025-11-1820:151 reply

            Fascinating. I just looked up a bit of research on it, and it seems there are two contradicting phenomena at play. Flashing helps in seeing cyclists further away and helps with visibility generally -- but it also makes it harder to estimate speed and distance.

            Apparently, the absolute safest solution is to have two rear lights side-by-side -- one that is always on and one that is always flashing.

            It doesn't seem like there's clear data on which is safer if you have to pick only one. Different countries/states have chosen differently.

            • By exmadscientist 2025-11-191:582 reply

              Flashing on-off and always on aren't the only options. I wish more designers went with flashing bright-dim, because it solves a lot of problems.

              I once worked on a device where we were required to blink the Important Safety Light™ on-off. I often glanced at this light out of the corner of my eye, and saw that it was off, so we were Safe™. We were not Safe™: it was just in the off phase of its blink.

              I am very glad I never got hurt by trusting that light.

              I wanted to blink it bright-dim but was denied by people who said that IEC 61010 required it to blink, and blinking bright-dim isn't blinking. I didn't quite understand that objection.

              • By crazygringo 2025-11-1916:351 reply

                Having a third brightness state feels confusing.

                If a safety indicator needs to be visible at a glance, why did it blink at all?

                Blinking only works for things that are in your vision and need to be the primary focus.

                It seems like blinking to begin with is terrible design for something like this, or else having it be in the corner of your eye is the terrible design decision.

                • By exmadscientist 2025-11-207:06

                  > If a safety indicator needs to be visible at a glance, why did it blink at all?

                  Beats me! But they've apparently flashed for ages and ages on these things, and somewhere along the line it got standardized.

                  > It seems like blinking to begin with is terrible design for something like this, or else having it be in the corner of your eye is the terrible design decision.

                  This is benchtop equipment, not cars, so "corner of your eye" has a little bit different context here. But, yes, I kind of agree.

                  It is also really important to get this one right since for this particular type of device, conditions are lethal (yes, genuinely lethal, no exaggeration) if you get cavalier with it.

              • By Y_Y 2025-11-1914:59

                This is a strong point. Nobody likes a rapidly flashing light (extra annoying, seems broken, can be hard to differentiate from "on but dim"). Then again if you flash slowly then you'll have some appreiable amount of time when it's off and that can include the entire opportunity you have to look at something.

                Ideally (for me) you could have smooth high-low alternation or colour alternation.

                (I recognize that something that looks like emergency services, e.g. alternating blue/white may be illegal, and that colour-blindness may limit this approach.)

          • By arccy 2025-11-1823:42

            but also there are so many bikes there already that they didn't need to raise general awareness that much

        • By Y_Y 2025-11-1914:551 reply

          I dunno man, I'm a cyclist, and I live in a big city full of cyclists. I've also used and seen a lot of bike lights in my time. Flashing is often an option, but the default is usually "always on".

          Also flashing is really fucking annoying, and I my own experience is that it does notale cyclista more visible or safe. I don't use flashing lights myself, even though I can't see the rear one and eould probably rather be annoying than dead.

          • By crazygringo 2025-11-1916:22

            It seems like it depends a lot on the city/country.

            To be clear, I'm talking about rear lights only. The front light is white and always-on so you can see the ground. Plus you can see what's in front of you, so you avoid things, people don't need to avoid you as much.

            It's the rear red light that flashes. You yourself don't see the flashing, but it increases visibility so people don't run into you, when you can't see them behind you.

            When I'm behind a cyclist with a flashing red rear light, it doesn't bother me. It feels safe. It probably encourages me to keep a little extra distance from them, which is a good thing.

        • By RandallBrown 2025-11-190:11

          Flashing lights on bicycles are illegal in a lot of places.

          If bikes didn't move, a blinking light would be fine. But they do move and it makes it really hard to tell where the bike is in the dark.

        • By jandrese 2025-11-1821:411 reply

          Blinding and dazzling oncoming traffic in the name of safety is outright stupid.

          If you are riding a bike and you're lighting up the heads of oncoming riders or pedestrians you are being dangerous and obnoxious. Never shine a flashlight above someone's shoulders at night if you can help it.

          • By crazygringo 2025-11-1823:044 reply

            What are you talking about? Did you mean to reply to a different comment?

            Bicycle lights aren't blinding anybody. At least none I've ever seen. They're powered by little batteries usually.

            The subject at hand was whether they flash or not. Not their brightness, which I've never heard anybody complain about.

            • By jandrese 2025-11-193:041 reply

              You definitely don't ride around here if you have not been blinded by a bike headlight. They can blow away your vision from half a mile away easily. I can't even see the trail in front of me without putting my hand up to block the light. I call it the nighttime salute.

              They are much worse if they flash. That blinds and disorients. Even after they pass you won't be able to see anything for some time.

              • By crazygringo 2025-11-1914:061 reply

                True, I'm referring to places where there are already car headlights. The bike lamps are so dim by comparison, there's nothing to complain about.

                If you're somewhere without any other lighting and your eyes have adjusted to the darkness, then I can understand how they might seem bright. But I'm not really sure what you think the solution is. They're already vastly dimmer than cars, but make them any dimmer and the cyclist won't be able to see the ground and it won't be safe.

                • By jandrese 2025-11-1917:031 reply

                  That is still very much not my experiance. I ride on the roads a bit and usually cars are fine, although there are people with aftermarket lights and people who just leave high beams on all the time in heavy traffic. But I've experienced riding down the road with oncoming traffic in the other direction and doing just fine until a bicycle comes and blinds me just like the high intensity high beam guys. They are generally much brigter in terms of light delivered directly to the eyeballs of oncoming traffic. Are you sure people aren't seeing you because your lights are too dim, or because you're making it impossible to see anything around them?

                  • By crazygringo 2025-11-1919:461 reply

                    Fascinating. I'm honestly quite confused -- most of the bike headlights I see simply run on 2-3 AA or AAA batteries, and it doesn't seem physically possible for them to output the kind of bright light you're talking about. I personally am very careful to angle them downwards, because the entire point is to illuminate the ground in front of me -- if I'm shining in people's eyes, then it's not illuminating the ground. And they're already so weak, you need all the illumination you can get.

                    E-bike rentals don't have anything adjustable, and where I am, they're quite fixed at illuminating the ground.

                    Maybe there are people with e-bikes who can draw a lot more power and have higher-powered headlights? Are you talking about e-bikes specifically? But it's just not something I've ever seen. I'm certainly blinded by vehicles while cycling under certain circumstances, but I've never once in my life felt blinded by cyclists or even anywhere close. That's why I'm so confused by what you're describing. When you say "blow away your vision from half a mile away easily", I honestly can't even begin to imagine what you're talking about.

                    • By jandrese 2025-11-1920:341 reply

                      You apparently have a bunch of old stock incandescent AA powered bike lights in your area? Around here it's all LiPo or LiFe+ powered LEDs that easily put out 1,000 lumens (not an exaggeration).

                      Stuff like this:

                      https://www.amazon.com/s?k=bike+headlight

                      You can even see people posting pictures of the light where it's clearly illuminating 10' up the tree on the side of the path.

                      https://m.media-amazon.com/images/I/61a2EhfJeeL.jpg

                      • By crazygringo 2025-11-1921:03

                        Not incandescent, it's still LED. I mean I don't know what percentage of riders have switched from the AA to rechargeable lithium batteries, or how much more current rechargeable lithium batteries provide.

                        I'll start paying more attention -- I'm curious now -- but I can still definitely say I've never felt blinded by a bicycle, or even close.

                        And the lights in that photo seem fine -- the road is pitch black just 20 feet in front. The tree is getting a lot of light reflected from the road and grass. The lights don't seem to be illuminating anywhere even close to as far as car headlights illuminate. None of that looks anything like what car headlights produce.

            • By 4ggr0 2025-11-1912:50

              while walking i frequently get blinded by eBikes which for some reason decide to point the lamp towards the sky to contact far-away civilizations, or whatever their plan is. happens quite frequent that i have to shield my eyes with a hand because i don't see anything until the eBike is past me.

            • By MobiusHorizons 2025-11-1915:45

              They 100% are. I’m a cyclists in Seattle ride to and from work 4-5 days a week. This time of year it’s dark by 5pm so bike lights are on full force on the home commute. Being dazzled by oncoming bikes happens almost every trip. I absolutely hate it, it’s sometimes even worse than the cars, although car headlights have caught up in awfulness in the last few years. My least favorite type of overly bright bike lights are the blinding and also blinking rear red lights.

              People do it for safety, but it doesn’t help. I literally can’t see where you are if you have a bright light shining in my face. The same thing is true if I’m in a car. As long as you have lights I can see you. If your lights are obnoxiously bright and especially if they are blinking you have succeeded in making people want to harm you, not increased your safety. The drivers who aren’t paying attention will not be more likely to see you if you are just a blinding glow of light.

            • By elric 2025-11-199:23

              > Bicycle lights aren't blinding anybody.

              They absolutely are. They suffer from the same phenomenon as car headlights. They're often poorly aimed (at an upwards angle instead of downwards) and have adopted an insanely bright white colour. I frequently yell at other cyclists when they blind me.

    • By Zak 2025-11-1817:26

      Another problem is LED lights using low-frequency PWM to control brightness. If they're moving in someone's field of view, there's a strobe effect.

    • By BobaFloutist 2025-11-1816:291 reply

      The thing that really irritates me about the animated turning lights is that they still do it when hazards are on. The one and only possible use case would be differentiating between hazards and turn signals, and they don't do it.

      • By thewebguyd 2025-11-1816:392 reply

        I've seen flashing third brake lights too.

        I don't get adding flashing lights to brake and tail lights. It's actually worse, flashing lights make it harder for us to judge distance as now there's no steady queue needed for depth perception. It's why when cycling I've always opted for a solid taillight instead of the flashing ones.

        • By toast0 2025-11-1817:411 reply

          Flashing third brake light (in the US) is usually a dealer profit addon. Personally, I think these violate federal vehicle safety law. I'll add a link to a federal letter that I think agrees with me [1]... But no enforcement means dealers alter the wiring harness to add these on to all their inventory and add a line item on the bill. They'll remove it if you complain, but the wiring harness has been altered.

          I'm ok with factory strobing on hard braking, and I think that is permitted generally.

          [1] https://www.nhtsa.gov/interpretations/20288ztv

          • By potato3732842 2025-11-1821:441 reply

            They're not altering anything. This isn't a stereo shop in 1990. They're literally just getting paid to plug something in.

            • By toast0 2025-11-1823:151 reply

              From the install guide [1] under "Installation Instructions, General", step 5 is:

              > Cut the positive wire to the third brake light and strip the insulation from both ends of the cut.

              That's altering the factory wiring harness. That's an extra junction the factory didn't authorize and when it fails, the factory warranty won't cover it, because the wiring harness modification lead to the failure. All so the dealer can make about $250 extra on a sale.

              If these were built as a module you plugged in between the wiring harness plug and the light module socket, I'd have a smidge less hate for them; but there's too many plug types for that, and there might not be enough room anyway, so the dealer has to cut into the wiring harness for this ... if there's a real benefit to flashing brake lights, it should be standardized and done by the manufacturers.

              [1] https://pulseprotects.com/wp-content/uploads/2023/09/Sales-R...

        • By sokoloff 2025-11-1817:46

          I’ve seen a few cars that have strobe-then-solid brake lights from the factory, where the strobe only fires under hard deceleration. That seems like a safety win to me. (Remember it being on a high-spec Mercedes SL, and I’m pretty sure it was stock; looked it up and Mercedes calls it part of “Adaptive Braking”.)

    • By mikkupikku 2025-11-1817:132 reply

      Those radar speed limit signs that blink at what seems like 50 times a second if you go 36 in a 35 zone are very annoying. To be fair the blink threshold must be configurable, but whoever installed them around here didn't have any common sense and set them all to the speed limit exactly.

      • By potato3732842 2025-11-1817:16

        There's one near me that's set to 45 in a 55. Every time I drive past it it gets a little closer to going missing. It's a minimum effort install on a wood post and it's right near the road to enter a new bougie subdivision in an otherwise rural area so it's almost certainly a cheap attempt to make a complainer go away.

      • By sobjornstad 2025-11-1913:23

        I also hate the ones that are exactly at the spot where the speed limit changes and still flash you aggressively in the distance. Yeah, I'm going faster than 35 because the speed limit is 55 where I am and I'm still slowing down.

    • By moltopoco 2025-11-1817:18

      Not just flashing but also flickering, some headlights that I've seen in the wild look quite aggressive if they are in the periphery; dimming gone wrong? Anything that flickers or flashes will be brighter at peak than if it was a constant light source.

    • By ethagnawl 2025-11-1819:45

      > The curse of modern super bright LEDs

      I don't understand why people are allowed to drive around with blinding LED light bars which affect other drivers ability to see the road and and _oh so conveniently_ obscure their front license plates.

    • By mr_toad 2025-11-1818:061 reply

      Housings on indicators that reflect so much sunlight you can’t see that they’re on.

      • By jimnotgym 2025-11-1820:05

        Plus some cars have tiny indicators now, or weird led stripes around the brake lights

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