One thing I often wonder is do car crashes happen more frequently when the sun is low in the sky and facing traffic? Surely someone has got together the data on traffic accidents, maps, times and a model of the earth/sun to work this out!
(Google search results for this are full of spam from a mix of motor insurance companies and sunglass companies)
There is a section of I-70 in Colorado that experiences temporary closures due to severe sun glare at certain times of the day and year. https://www.codot.gov/travel/sunglare
Couldn't tell you where I've read this but I heard years ago that it makes a difference indeed. Now I'm wondering if that was just the person who said or wrote it just giving an example of what kind of considerations you need to incorporate when optimising for safety, or if they actuality had data on this
As a young driver I was given the advice that if you see a lot of oncoming cars using their sunshade or squinting into the sun as they come towards you, it's time to pull over and wait it out.
Driving with the sun at your back is never a good time to be on the road.
(Google search results for this are full of spam from a mix of motor insurance companies and sunglass companies)