I wonder how long it will take until it is illegal to have a human driving a car. I am sure self-driving cars will cause much fewer accidents. Even better: once all human-driven cars are gone, traffic can be organized incredibly efficiently, esp in areas without human interference like on Freeways. Cars won't need to stop anymore. Traffic lights could communicate when they will be red or green well in advance and allow cars to slow down or speed up a little. That would greatly increase fuel efficiency and allows prevention of traffic jams.