Actually many times preventing car accidents is directly related to clear vision and an unobstructed view. Sun glare can temporarily blind a driver, making it impossible for him or her to see what is happening in front of them. Consequently, as many as 9,000 glare-related accidents occur each year, making sun glare one of the most common accidents resulting from environmental conditions
In the winter the earth tilts away from the sun .UVA is the longer of the suns rays. This means they reach earth no matter how the tilt of the Earth is. UVA rays are constantly covering every spot on which sun light reaches. If there is sun light there is UVA. The UVA does not get weaker, just like the sun light does not get weaker during winter. Sun-glare can actually be worse in winter months due to ice and snow , which intensifies the sun's UVA rays.
A study on bright sunlight and the incidence of life-threatening motor vehicle accidents indicates that while there is an average accident risk on a day with normal sunlight, that risk increases by 16% when it is exceedingly sunny and glare is increased. Sun glare while driving can hinder vision. QUALITY WINDOW TINT applied to a vehicle’s windows can significantly reduce sun glare.