LVSteve
Member
A big part of the problem is headlight’s.
Halogen is most prevalent but terrible. Xenon and LED are the best but more expensive.
23% of 2024 vehicles were rated at marginal for their headlights.
If you are referring to the tests carried out by Consumer Reports, then IIRC everything except that 23% was rated poor.

The European manufacturers have cracked it with matrix LED lights that can throw different amounts of light in different directions and vary what each headlight is doing. Audi have a system where cameras on your rear view mirror detect oncoming cars and instruct the headlights to reduce light in that direction. That is specifically verboten by the USDoT regulations. Indeed, those regs still require a certain amount of upward 'throw' to illuminate reflective overhead signs. Not exactly Plan A when trying to minimize glare with HID and LED illumination.
When HID lights first came out, the Euro regs were changed to require automatic headlight leveling on HID equipped vehicles. The USDoT actually opposed importation of cars so equipped for a while.



I was horrified to discover when I arrived in the US in 1997 that they were still fitting transverse filament, sealed beam lights to new cars. I think we gave that up in the UK about 1986. I fitted a pair of euro spec Cibie Z beam headlights to my '96 Firebird and was asked by passengers where I got the high output bulbs. Thing was the bulbs were the same rating as the sealed beams, but the light was put to far better use.