By now, seeing one of Google’s experimental, driverless cars zipping down Silicon Valley’s Highway 101, or parking itself on a San Francisco street, is not all that unusual. Indeed, as automakers like Audi, Toyota and Mercedes-Benz make plans for self-driving vehicles, it is only a matter of time before such cars become a big part of the great American traffic jam.

While driverless cars might still seem like science fiction outside the Valley, the people working and thinking about these technologies are starting to ask what these autos could mean for the city of the future. The short answer is “a lot.”