You're onto an important theme: so much of driving is really about group communication--everything from signaling to anticipating behavior based on your own pas

You're onto an important theme: so much of driving is really about group communication--everything from signaling to anticipating behavior based on your own past actions, to waving people through intersections or slowing down to let someone merge or speeding up to make your intent more clear, or hanging back when the traffic gets stupid, or avoiding drivers who seem irrational. That's why I think the real self-driving car problem is a very special case of the Turing Test--one that might be more difficult to win or solve.