I do not think that a 'fully intelligent AI' is necessary for full autonomous driving: if a universal communication protocol for driving were to be introduced,

I do not think that a 'fully intelligent AI' is necessary for full autonomous driving: if a universal communication protocol for driving were to be introduced, cars could communicate with one another as well as announce themselves when entering intersections for example, therefore mitigating the need for an 'AI'. "I am driving at 45mph at [GPS Coordinates] [UTC Timestamp]". "I'm braking [GPS Coordinates] [UTC Timestamp]".