> self-driving-ability increases the willingness of people to idle their cars in traffic I disagree with this premise. There is a cost to idling in traffic: el

> self-driving-ability increases the willingness of people to idle their cars in traffic I disagree with this premise. There is a cost to idling in traffic: electricity/gas expended while idling, and the opportunity cost of recharging/refilling before going home, if your car idled too much. Reducto ad absurdum: there will always be a need for airport parking lots. If there is income to be made, Uber-style, from idling your autonomous car, effectively decreasing the costs of idling, then it's easy enough for the municipality to tax income from services like Uber untill some equilibrium is reached, whereby most people are incentivized, like today, to take high-throughput public transit. Everything old is new again: particularly, taxi medallions.