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PaperclipPerfector  1yr ago (text post)   3307 thread views

Friday Fun Thread for October 25, 2024

Be advised: this thread is not for serious in-depth discussion of weighty topics (we have a link for that), this thread is not for anything Culture War related. This thread is for Fun. You got jokes? Share 'em. You got silly questions? Ask 'em.

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TIL: According to IIHS (the Insurance Institute for Highway Safety), the stock headlights on many cars are inadequate. For example, the popular Honda Fit hatchback has headlights that are only "marginal" (2 stars out of 4) or "poor" (1 star), depending on trim. (Several different measurements go into the overall rating. Speaking very roughly, though, IIHS wants to see illumination of 5 lux out to a distance of 100 meters, while the Fit's headlights achieved that illumination only out to 72.4 meters.)

Headlight bulbs that are much brighter than stock while still remaining in compliance with laws regarding off-center glare (unlike some LEDs) are available for a few dollars from various sources—e. g., RockAuto. Note that illumination distance increases with the square root of brightness: 1 lux of illumination is 1 lumen of brightness per meter squared. For example, multiplying brightness by 2.3 will multiply illumination distance by only 1.5—but that's enough to bring the Fit up to IIHS's standards (from 72.4 meters to 110 meters).

The thing that drives me up the wall these days is headlights that shine directly into opposing traffic. I don't know what the fuck is going on recently but probably about every tenth car is blinding me at night.

I don't know what the fuck is going on recently

Well, 3 things:

  • Ride heights are much higher than they were 10-15 years ago. "Hatchback with a lift kit", which is what all CUVs fundamentally are, weren't quite as dominant in 2010 as they are now (where you can't buy a non-lifted hatchback). They make sense if you can only own one vehicle though. As a result, the headlights are going to be physically higher up on the vehicle than they otherwise would be. [Aside: people also like these things because being higher up is the only way to regain the visibility that those increasingly-absurd impact ratings costs you; I feel that if you drive sufficiently incompetently as to roll your car at high speed you probably deserve to die relative to the number of pedestrians that lack of visibility kills, and have already put my money where my mouth is on that point.]

  • If you're sitting higher up relative to the road, your headlights will be adjusted up (relative to a lower vehicle) so that you can see further out. Thus, if you're in an CUV, your lights are going to be aimed from the factory such that you'll blind anyone in lower vehicles.

  • Average color temperature of the lights has gone from 2700K to 6500K. This might even be a net negative on how far you can actually see, but it's far brighter up close and fucks up your night vision, which is what actually matters.

At this point I'm a lot more aggressive about not turning my brights off when I see an oncoming car (unless I see the telltale flicker of them turning theirs off, naturally), because if they don't turn them off I'm blind when they pass.

now (where you can't buy a non-lifted hatchback).

Sure you can, it's called a Prius. Or a civic hatchback.

If you're sitting higher up relative to the road, your headlights will be adjusted up (relative to a lower vehicle) so that you can see further out. Thus, if you're in an CUV, your lights are going to be aimed from the factory such that you'll blind anyone in lower vehicles.

This i don't find totally convincing. Why do they need to be adjusted so you can see further out? Obviously you can always aim the headlights higher to see further (and that's what high beams do, partially), but that can't be legal.

At this point I'm a lot more aggressive about not turning my brights off when I see an oncoming car (unless I see the telltale flicker of them turning theirs off, naturally), because if they don't turn them off I'm blind when they pass.

Why are you driving with your brights on?

Why are you driving with your brights on?

It is mentioned in the IIHS article linked above that high beams are supposed to be used on roads with hardly any traffic.

Researchers from IIHS and the University of Michigan Transportation Research Institute found that drivers in and around Ann Arbor, Mich., didn’t use their high beams enough. Only 18% of drivers who were isolated enough to make use of their high beams did so.

Yes, that's true. I'm assuming that he doesn't live out in the sticks, but perhaps I'm wrong.

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