The National Highway Traffic Safety Administration has asked Waymo for more information about its self-driving system and operations following reports from the Austin School District that its robotaxis illegally passed school buses 19 times this year.

In a December 3 letter sent to Waymo, regulators requested detailed information about its fifth-generation self-driving system and operations. Reuters was the first to report on the letter, which comes two months since the agency opened an investigation into Waymo over how its robotaxis perform around stopped school buses.

The agency’s Office of Defects Investigation (ODI) opened its initial investigation into the Alphabet-owned company in October after seeing footage of a Waymo autonomous vehicle maneuvering around a stopped school b

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