Road wear isn't the only consideration though. Cars take up space on the road while driving, and as anyone who's ever been in a traffic jam knows, there is a li

Road wear isn't the only consideration though. Cars take up space on the road while driving, and as anyone who's ever been in a traffic jam knows, there is a limited amount of road space available. Maybe it'd make sense for trucks to fund the majority of wear-induced maintenance costs, but for new construction and improvement projects (e.g. increasing the number of lanes on a highway) cars should pay a significant portion of that.