One of the very unusual things with regards to tinting of glasses in vehicles which makes me really wonder why it is allowed, is the tinting of the front windshield. I do not know if it is legal but with so many cars on the road with tinted front windshields and no one stop them. I believe it must be legal. I keep asking myself how could drivers manage to see through tinted front windshields during the night especially in areas which have little or no street lights? Frankly, I cannot see the driver from the outside. As a person who has been driving for so many years, I make sure the front windshield of my car is always clean to allow for perfect visibility. Yes, it does make a difference in driving and in safety.