An anonymous reader writes: The Atlantic has a story with some video of a traffic simulator showing just how the roads can be jammed up by people looking for a place to park. (You can play with the simulator too.) This has been suspected for a long time by many traffic researchers and city planners, but the simulator shows just how quickly the roads jam up after just a few of the blocks fill up with parked cars. The good news is that autonomous cars don't need to park-- they just go give someone else a ride. They could change city life forever.