Self driving vehicles, with current technology, are unrealistic outside major cities. Major cities are the places where you least need a personal car.
Google Maps still thinks the speed limit on a nearby highway is 35 mph. We spent several months without lane markers on the highway. Any vehicle driving around here based on the current self-driving architecture, requiring central mapping/planning and good infrastructure, would be ridiculously unsafe.
Not to mention how lost they would be the moment they turned off the highway.
