Here in Colorado you have to be minimum 50 feet from the center line of the road for your shot to be legal. Hunting from motor vehicle or all terrain vehicle is prohibited. Also transporting rifles and shotguns uncased and chambered is illegal. On ATV's they have to be in hard case, soft ones are not acceptable. However long story short , we are legally responsible for every bullet, pellet or released arrow from the moment when they leave muzzle or part away from the string till they land. My advise is if you have any doubts "DON'T DO IT".