The stopped school bus had partially blocked a driveway the Waymo was exiting, according to the company. As a result, the flashing lights and stop sign were not visible to the vehicle. The Waymo then drove around the bus's front end, making a left turn at a low speed, at a distance from the students exiting the bus.

The National Highway Traffic Safety Administration has opened a preliminary investigation into roughly 2,000 Waymo robotaxis fitted with automatic driving software after one of the autonomous vehicles...