Driverless cars won't always look this way

Qawiyah Muhammad can see her own future. An Uber driver in Pittsburgh, she knows that one day her job will be replaced by a robot car. She knows the robot cars are coming because she sometimes spots experimental models driving themselves around town. "You can tell them apart," she said, "because they have a thing on the top of the car, like'Back to the Future.' " There's a reason they stand out so much, and it's not because Uber or anybody else thinks they look cool. On top of Uber's new driverless cars is an array of bulky sensors – cameras, radars, lidars – that eventually will be shrunk into a more discreet system that will replace Muhammad and thousands of other Uber drivers.