NH State Police Mean Business About Clearing Snow/Ice from Your Roof Before Driving
It's not worth hurting someone!
Removing Snow From Car Roof Could Become Law In Maine
Current law doesn't require snow/ice removal from a vehicle's roof but changes could be coming to mandate it in Maine
It’s Not Illegal to Drive With Snow on the Roof of Your Car in Maine
While there's no specific law at this time for not clearing off your car, it's still dangerous and you could potentially be held liable in certain situations.