Cities would certainly naturally expand in a suburb-ish type of way. The issue with the current American style of suburbia is how expensive it is, and the extre

Cities would certainly naturally expand in a suburb-ish type of way. The issue with the current American style of suburbia is how expensive it is, and the extreme subsidies (both monetary and political pressure/force) what were implemented to set up the system in the first place. Without that, America would have much denser "European style" urban hubs, and likely more active small cities than currently exist.