[japhyr]

> 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.

[bespokedevelopr]

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.

[GrinningFool]

> 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.

[VBprogrammer]

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.

[japhyr]

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.

[VBprogrammer]

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".