Old car headlights were all the same — which was a fairly bright idea

Technology Connections · 2.5M views · 2022 · 25:21

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Why Hacker News recommends it

Recommended as a clear explanation of why old headlights looked as they did, and as a case study in mandating requirements versus solutions.

What it is

Technology Connections explains why American cars all had the same standardized sealed-beam headlights until 1957. It covers the regulations behind the design and the effect on night visibility.

Recommended by 4 HN commenters across 3 different months, 2022 to 2023.

What Hacker News said

Strong rec jameshart · 2023-03 · on “A Short History of the VW Mark 1 Rabbit/Golf”

Tech Connections has, as so often the case, a great video about why old car headlights were the shapes they were - and why in later models they often changed: [this video]

Recommends xani_ · 2022-10 · on “The US will finally allow adaptive beam headlights on new cars”

Also interesting piece about why US was stuck in decades of same light design because of more stupid regulations [this video]

Recommends NeoTar · 2022-10 · on “Where did all the “reject” buttons come from?”

There is a YouTube channel called Technology Connections which has a video about American car headlights: [this video] which I think illustrated a good example of the difference between mandating a solution, and mandating requirements. Considering car headlights. Obviously there are some requirements we should make - they need to be bright enough to safely light-up the road. They should not blind oncoming drivers. They need to be reasonably safe in the event of a collision. Between the sixties and 1984, the government of the USA mandated a solution. Basically one model of headlights was permitted (with a few minor variations introduced over time). If you look at all car models from this time they

Recommends dharmab · 2023-07 · on “Tesla Gives New UK Owners a ‘Reacher’ Stick to Deal with Left-Hand Drive Cars”

There's two major safety issues: You can't see around cars to be able to pass. Okay, so you often don't pass. But much more importantly, car headlights aren't symmetrical. The one pointing towards the oncoming lane has a "cut" beam to avoid blinding other drivers while the other has a taller beam to improve visibility of anything entering the road. When you drive LHD in a RHD country, or vice versa, you are blinding other drivers while having low visibility of pedestrians and animals. Technology Connections did a great video about this. His solution was to stop driving his RHD car in low light. [this video]

Cites adql · 2022-12 · on “Cops Can Extract Data from 10k Different Car Models’ Infotainment Systems”

Right but in this case the actions taken were wrong, were not fixed, and still are not fixed. Like the fact only in near future it will be legal for US cars to have adaptive lights. Or how for years [1] near every car light was same ineffective design. Over-regulation is as dangerous as under-regulation. If car manufacturers have to squeeze fleet averages (which is on its own retarded idea, just tax every model separately ffs) for normal cars. Or how apparently 20MPG sportscar is "gas guzzler" but 15MPG SUV is not * [1] [this video]

Cites cogman10 · 2022-12 · on “Musk, the Anti-Censorship Crusader, Allegedly Shadowbanned ElonJet Account”

I think for it to work, you pretty much need federal regulation to step in and standardize. I have this video in mind [1] If we can have EV packs sizes, structural capabilities, voltages, and max currents defined then we can start having swapping services and maybe even better recycling. [1] [this video]