Maybe you are seeing just a bit into the ultraviolet spectrum. Halogen headlamps emit a lot of uv light. When uv hits reflective paint, the wavelengths are probably lengthened and may make it just into the edge of visibility for some few people who are very sensitive. One clue is that you are seeing it as purple, which is the color closest to the UV spectrum. A Google search finds a lot of people seeing purple at night when driving, but no one seems to see any other colors. Why purple? It would make sense if it was UV. Perhaps it is easier to see at night when the pupils are large and the other color seeing eye cones are no longer able to function due to low light.
it helped the citizens of the world see while they where driving at night or during a storm or foggy day.
If you see a red blinking light on a bike while driving at night, you should slow down and be cautious. The red blinking light indicates that there is a cyclist ahead, so give them space and pass them safely. It's important to be aware of your surroundings and watch out for cyclists to prevent accidents.
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A mirror smooth surface is typically easier to see at night while driving as it reflects more light from vehicle headlights, making it more visible. A pebbled uneven surface may create shadows and reflections that can obscure visibility in comparison.
Within the distance you can see ahead
because you can't see them at night and plus when you are driving you don't want to hit them.
Wear sunglasses. You will still be able to see the road.
Most states allow holders of learner's permits to drive at night because it is necessary to the learning experience. Holders of occupational and other driving permits should check their restrictions to see if driving at night is permitted.
It's recommended that sunglasses be worn for driving so you can see clearer.
As a seizure can happen at any time, someone who is driving at the time is obviously a potential risk. Different countries have different laws relating to driving and epilepsy. Someone who has any history of epilepsy is often barred for life from driving something like a bus and there is no way they could ever get a pilot license. For a car, it is often a case that they have to be clear of seizures for a period of time, like a year or two, before they will be allowed to get a driving license. A truck being a larger vehicle, poses a larger potential risk on a road, so the law would be stricter, but that depends on where someone is. It differs from one place to another. You would need to check with the laws where you are.
see CarTalk.com