‘Automatic headlights’ don’t work in fog?

[u/clynchy97]

About 40-50% of the cars we passed on the road today had no headlights on or only had the dim side lights. Do automatic lights not work in fog for these modern cars? Seems super sketchy

[u/stevekuehltruhe]

Nope. They work with a brightness sensor. Technically speaking it's "bright enough" in the fog so they don't activate.

I think for some premium cars they work in conjunction with other sensors and maybe even GPS/weather data.

Edit: But what I really find annoying is that the dtrl only light up the front LEDs and not the rear lights. I feel like that would be the bare minimum for this case.

[u/curiousredder → u/stevekuehltruhe]

I feel that the issue is that DRL are often so bright that a driver can believe they have their "lights" on (and in some cases i've seen the dashboard backlighting on too, reinforcing this belief).

DRL's should include rear lights too, or should be present only when fully functioning auto-lighting is also present.

[u/janck1000 → u/curiousredder]

I think in Scandinavian countries rear lights are on along with DRLs.