Waymo Recalls Nearly 3,900 Self-Driving Cars Over Failure to Recognize Construction Signs

Alphabet-owned Waymo is using its robotaxi service to commercialize driverless technology, but its system must still contend with rare, high-risk edge cases such as torrential rain and flooded roads. Misjudging water depth or whether a road is passable could endanger passengers and other road users, underscoring the challenge of validating safety before autonomous-driving services can expand at scale.

Waymo vehicles recently drove into flooded areas in separate incidents in Texas and Atlanta after their software failed to accurately identify waterlogged roads. The company announced a recall of 3,791 vehicles for a software fix and expanded its robotaxi service suspension to four cities, including Atlanta. Available information does not disclose the exact recall date or the value of losses from the incidents.

Waymo robotaxis operate in U.S. cities including San Francisco and Austin, relying primarily on sensors and remote assistance to handle unusual road conditions. When the system cannot immediately recognize road closures or the movements of emergency vehicles, it can hinder ambulance and firefighting operations, raising questions about urban public safety and regulatory responsibility for the service.

A recent report said a Waymo vehicle blocked an ambulance responding to a shooting, with emergency personnel saying the problem was getting worse. The available information did not disclose the exact date of the incident or the length of the delay in minutes. City authorities in San Francisco and Austin have asked Waymo to connect to emergency notification systems and improve the speed of remote intervention and the vehicles’ ability to yield.