Imagine: A World Where Nobody Owns Their Own Car

If connected vehicle technology becomes mandatory in American cars, as the Department of Transportation recently suggested it might, the most obvious benefit would be safety. Cars that can tell other cars their speed and position are far less likely to crash. But as David Zax pointed out at Cities earlier this week, that's just the beginning. Combine connected vehicle technology with intelligent infrastructure and driverless cars and you get a commute that's both quicker and hands-free. You could even rely on autonomous taxis to chauffeur you from home to work.

In that sense, a world without car crashes may just be the first step to a world without car-ownership.