This is the right answer. Requiring most American adults to own cars that spend 90% of their time parked is enormously wasteful, both directly (expenditures on

This is the right answer. Requiring most American adults to own cars that spend 90% of their time parked is enormously wasteful, both directly (expenditures on cars, maintenance, etc.) and indirectly (that we, societally, have to provide three times as much street space as each car will occupy at any one time: home parking space, rush-hour road space, and workplace parking space). The era of everyone having their own car should end.