Not wiping snow off
Two things can happen when you leave snow on top of your car. First, it can blow off the car and into the vision of drivers behind you. This creates a distracting and sometimes dangerous situation. Also, the snow and ice can start melting when the car is warm and in motion. When the driver brakes, that snow could then slide forward and cover the windshield, making it impossible to see.
“Cleaning it totally off the car is one of the safest things you can do,” Paul said.