Keep in mind that this may not change when driverless cars become widely available. Maintaining a fleet thousands of driverless cars may prove to be more expensive than crowdsourcing a vehicle fleet.
There's either two possibilities for the self-driving future. 1) Hardly anybody owns cars anymore. When we want to get from point A to point B, we just call a driverless car from the network. But this type of service is a natural monopoly. When people are ridesharing everywhere, the network with the biggest fleet, becomes the stochastically fastest and cheapest option. Plus add in the fact that they're collecting a l…
You got yourself a national fleet. Note, that my comment does not necessarily has the US in mind.