How good are American roads?

> Interestingly, in all cases urban roads are worse quality than rural roads, presumably because they see higher traffic than rural roads.

There's more infrastructure under urban roads. Crews come in to fix some utility, shred a section of a lane, patch it poorly with dissimilar materials, and leave.

Part of it is funding. Highways are for the most part federally funded, and the feds can print money at will. Urban roads have to be repaired from the city budget, and user fees (fuel taxes) are nowhere near enough to keep them maintained properly.