"Driverless car" is probably not the outcome for autonomous vehicles. At one end of the scale, cities will use road space vastly more efficiently with optimized vehicles for groups of riders, and at the other end of the scale, short-haul air travel will be challenged by door-to-door 150mph+ highway vehicles. None of these will look much like a personal car, and only the wealthy will consider owning one that will become rapidly obsolete and have a meagre duty cycle a sensible idea. For many people the answer will be a bicycle because the roads will become a safe place for cycling.