That's true. Really it would turn this into a last-mile problem where rural communities that didn't have the land value to justify big infrastructure projects would have terrible roads.
Snark aside, it makes more sense just to add an additional tax to semis during the licensing process to go to road maintenance. There's already way too much tracking going on as it is, and then there's the fun of having your plates stolen or whatever getting you stuck with another bill to contest.