The most useful safety advice for winter driving is the one too many people ignore—clean the snow off the roof of your car. There’s nothing more infuriating after a snowstorm than to see someone flying down the road with a roof full of snow, locked and loaded like an icy gun, ready to cause an accident. Slabs of snow and ice could fly off the back of your car and hit the vehicles behind you. The snow could also slide forward when you hit the brakes, completely obscuring your view of what’s ahead. Driving around with snow still covering your roof or windows is illegal in some states and it’s not safe. Invest in a snow brush. It takes a little bit of work, but it’s worth it to avoid an accident or hefty fine.

§ 3720. Snow and ice dislodged or falling from moving vehicle. -When snow or ice is dislodged or falls from a moving vehicle and strikes another vehicle or pedestrian causing death or serious bodily injury, the operator of the vehicle from which the snow or ice is dislodged or falls shall be subject to a fine of not less than $200 nor more than $1,000 for each offense.(May 11, 2006, P.L.159, No.37, eff. 60 days; Oct. 19, 2010, P.L.557, No.81, eff. 60 days)

§ 4524. Windshield obstructions and wipers. (a) Obstruction on front windshield.--No person shall drive any motor vehicle with any sign, poster or other nontransparent material upon the front windshield which materially obstructs, obscures or impairs the driver's clear view of the highway or any intersecting highway except an inspection certificate, sticker identification sign on a mass transit vehicle or other officially required sticker and no person shall drive any motor vehicle with any ice or snow on the front windshield which materially obstructs, obscures or impairs the driver's clear view of the highway or any intersecting highway.(b) Obstruction on side and rear windows.--No person shall drive a motor vehicle with any sign, poster or other nontransparent material, including ice or snow, upon the side wings or side or rear windows of the vehicle which materially obstructs, obscures or impairs the driver's clear view of the highway or any intersecting highway. The placement of a registration permit upon the side or rear window of a vehicle shall not be considered a material obstruction.(c) Other obstruction.--No person shall drive any motor vehicle with any object or material hung from the inside rearview mirror or otherwise hung, placed or attached in such a position as to materially obstruct, obscure or impair the driver's vision through the front windshield or any manner as to constitute a safety hazard.(d) Windshield wiper systems.--The windshield on every motor vehicle other than a motorcycle or special mobile equipment shall be equipped with a wiper system capable of cleaning rain, snow or other moisture from the windshield, and so constructed as to be controlled or operated by the driver of the vehicle