Even if we don't get fully self-driven cars soon, I really hope we get autopilot to take over for timing left turns and yellow lights, entering a highway, avoiding pedestrians, and maybe all parking.

Sure, many drivers handle that all fine most of the time, but each one seems like a potential point of failure that would benefit from a little more standardization.

EDIT: Or traffic robots that direct instructions to proceed or stop to each specific driver. Seems like we have better options than a colored indicator involving a lot of judgment calls based on conflicting interests.