Examples: 1) immediate unplanned stop at a yard sale 2) drive "off road" to get around an obstruction 3) dealing with unstructured parking situations 4) avoiding emergency stops in unsafe locations 5) driving through puddles (is it 2 inches or 2 feet deep?) 6) etc.
And for some significant transition period the road will be populated by both manual and computer driven cars.
How does the hybrid system work? Won't many people take advantage of "dumb" cars. How would you drive if you knew many cars were computer controlled. Would people figure out how to "game" the known computer driving rules? I don't pull out in front of cars that are too close because the human might not stop and hit me. Maybe I don't worry about it if I know the computer is in control of the other car.
Long haul freeway driving does not seem too complicated. But what about high density suburban and city driving?