[gdrulia]

While I bet they work brilliantly for the driver of the car, for the oncoming traffic it's really annoying. It leaves light spots in my eyes every time I drive in the night and encounter cars with such headlights, as it doesn't deactivate those 'pixels' quick enough for me not to notice. Overall it might be an improvement, but it depends on your situation.

As for extra light at road signs, I believe I've read somewhere that newish signs have ability to reflect near ultraviolet as visible light, and this makes them extra reflective for headlights with ultraviolet range, more so then what you would expect for the given visible light that you see. Although I'm no expert in this and not sure if that actually the reason for why some signs popout so much.

[dr_orpheus]

Yes, lots of modern road signs that are put in have a flourescent coating on them. [1]

[1] https://www.3m.com/3M/en_US/road-safety-us/resources/road-tr...