Robot Cars won't be autonomous
Many comments are based on the automobile reality we have become used to and NOT the scenario presented here. Points to consider.
Ownership: If Shared Mobility as a Service, the liability is on the company.
Accidents: Will not become a thing of the past due to malfunctions but will be greatly reduced. The cars will be 'aware' of other vehicles and slowdown or speed up to pace. Routes would be calculated on the best scenario at a point in time.
Unauthorized use: Easy problem to solve. Bio security is at the top of its game and getting better.
The BIG question? What if the network gets hacked and we have 100,000 ground level projectiles crashing into urban targets at top speed? If we can't keep them out of CitiBank, Sony, and Lockheed Martin, How are we going to keep this safe? Sprawl? Who cares!