The case I was responding to was one of car breakdown. Of course the other case would be an emergency while the car is moving (which is what you are talking of)

The case I was responding to was one of car breakdown. Of course the other case would be an emergency while the car is moving (which is what you are talking of) and here i think the evidence is compelling. To hand over control to a distracted driver at the worst possible moment is not likely to work well. It actually does not work well even for trained pilots, as the Air France crash some years ago showed.