Self-driving vehicles enable smaller higher-frequency buses in less-dense areas. And auto-taxis for the .50cent/mile cost of a personal car cut the Gordian kno

Self-driving vehicles enable smaller higher-frequency buses in less-dense areas. And auto-taxis for the .50cent/mile cost of a personal car cut the Gordian knot of parking politics that often prevents new dense development in urban neighborhoods, since people don't need to own their own cars to take economical car trips occasionally. And they shift the economics of vehicle ownership, so fewer people own cars, and thus fewer people identify as 'drivers' that are only concerned with roadway widening and parking construction, rather than public transit provision. And, if nothing else, they'll make a big dent in the 30,000 people killed by automobiles every year.