But Chris Urmson, director of the self-driving car project at Google, said that the new prototypes dispensed with the steering wheel and brakes because there was no guarantee that a human occupant would be able to take over in an emergency, and that it was simpler just to have an emergency stop button.

But Chris Urmson, director of the self-driving car project at Google, said that the new prototypes dispensed with the steering wheel and brakes because a human passenger might not be able to take over in an emergency, and that it was simpler just to have an emergency stop button.
