I bet self driving cars are first adopted enmasse in Asian cities (primarily Chinese ones) given need. Even though the driving (and pedestrian) habits seem to imply otherwise, the chance to optimize limited road infrastructure will just be too juicy for the politicians to pass up. In fact, lots of companies are working on self driving cars in china right now for this reason (also, it’s much more likely given china’s autocratic government).

The US is pretty big. I have neighbors that ATV and snowmobile the last few miles to their house, except during the very few months that they can wrestle an old Jeep up there. Google Maps isn't very helpful.