Waymo, self-driving cars, are testing in Philadelphia. Soon to be driving autonomously.

Cars are roaming Philly streets without a driver. We told you about this over the summer. Waymo is testing its fleet of autonomous cars in the city. You may have seen the vehicles on the road. Despite carrying a full suite of sensors, there's an actual human behind the wheel. Waymo says once their cars get the way of the land, they can begin driving autonomously.