I think if you looked deeper, you'd find that the restrictions for where you could and could not drive tanks are more restrictions on the _roads_ than the _tank

I think if you looked deeper, you'd find that the restrictions for where you could and could not drive tanks are more restrictions on the _roads_ than the _tanks_ The government owns the roads, ergo can sidestep a lot of the what might otherwise be mandated under strict scrutiny for their usage with rational basis tests. E.g., "the roads are rated for <x> class of vehicles, and a tank is <y> class."