[jcgrillo]

Another possibility that's fun to imagine in a world where every car is self-driving and connected to all the other cars is traffic meshing at speed (say, 25mph) through intersections. You wouldn't need traffic lights anymore, because the vehicles would be able to set their spacing and velocity correctly to avoid colliding. Unfortunately, self driving cars can barely figure out how to merge onto a freeway so we may be some decades away still.