I hope you are right but I am skeptical that the reduction in the number of cars will offset the increase in miles driven over the next couple decades where it

I hope you are right but I am skeptical that the reduction in the number of cars will offset the increase in miles driven over the next couple decades where it matters most. Shared-use vehicles exist (the taxis you mention, as well as car shares and rental cars) and with the exception of cities that have extremely expensive car ownership costs most people still choose to own a personal vehicle for commuting. Would you rely on the availability of a shared vehicle during rush hour to meet your commuting needs? I have a very hard time imagining many Americans who live in a suburb or car-dependent city giving up their private vehicle no matter how cheap or reliable shared vehicles become. Perhaps if car ownership became two or three times more expensive (e.g. carbon taxes on new vehicles, no parking minimums, paying market rates for parking spaces, etc) people might switch, but I am skeptical that any of those will come to pass as long as most voters drive cars.