I honestly can't picture a self-driving AI that doesn't just amount to straight-up General Intelligence. Not only does driving involve predicting the trajectory

I honestly can't picture a self-driving AI that doesn't just amount to straight-up General Intelligence. Not only does driving involve predicting the trajectory of various moving objects (already very hard), it involves predicting the behavior of various other intelligent agents as well as communicating with them. Especially that last one -- nobody seems to consider how much we communicate while driving. Several types of communication require having a body: flagging someone on, waving "thank you", eye contact, LACK of eye contact ("they don't see me, I better [prepare to] brake/swerve"). Some involve subtle movements of the car: rolling forward after a stop sign ("I intend to go next"), or hugging one side of lane. Even something as apparently binary as beeping the horn can indicate probably a dozen or more different things depending on physical context and length of the beep, not to mention local culture.