A Waymo hit a child near an elementary school in Santa Monica

Federal regulators are probing whether a Waymo robotaxi acted safely after hitting a child near a Santa Monica school.

Brontë Wittpenn/San Francisco Chronicle via Getty Images

• US safety regulators opened a probe after a Waymo robotaxi struck a child near a school.
• The crash happened during school drop-off hours with kids, guards, and parked cars nearby.
• Waymo said its driverless system braked sharply, cutting speed before the child was hit.

Federal safety...