Around 2,000 Waymo vehicles are under investigation after reports of one of the self-driving taxis navigating around a school bus while children disembarked.

The National Highway Traffic Safety Administration opened a preliminary investigation Friday to examine the performance of Waymo's autonomous technology around stopped school buses and how the system is designed to comply with school bus traffic safety laws, according to the investigation filing .

The incident occurred Sept. 22 in Atlanta, when a Waymo using the Mountain View, Calif., company's fifth-generation automated driving system approached the right side of a stopped school bus. The vehicle initially stopped but then drove around the front of the bus and past the left side, the filing said.

The vehicle ignored the bus

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