Exactly. Any such remote control would have to be trivial for a cop to use, and also need to directly control only the car(s) the cop is currently interacting with. Think of a situation like this where a traffic light is disabled and a cop is there directing traffic. If driverless cars are approaching from multiple directions then how does the cop direct his commands to only the one he’s focusing on at the given moment? Not all that easy when you think about it…