Suburban to rural will still own personal vehicles, as will trades people and general off elevated rail travelers. Certainly rental will be instant, driven to your location for use indefinitely. High density urban living allows people/goods transport systems block to block.  Two things must be designed around overall. One, the complexity of utility our current automobiles give us (stores/secures considerable personal items wherever we go, hauls objects you will not want to be getting out of a car onto a public train car and then into a third car with, is a personal shelter, etc). Second is the invested infrastructure of our living spaces today are spread out for miles and miles and extend town to town across all states... driven by our new found ability to live anywhere, of having generational acceptance to the personal timing of all ground travel movement, and the installed paved connections to each and every home out there.  Driverless cars are a band-aide to super-national MagLev.