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Waymo will update its software after a power outage in San Francisco snarls the self-driving cars

Alphabet's Waymo unit said on Tuesday that it would update the software used to operate self-driving vehicles and improve emergency response protocols. This comes after Saturday, when its robotaxis in San Francisco stalled due to an extensive power outage which snarled city traffic.

Waymo paused its service on Saturday night following a fire that broke out at a PG&E power substation, knocking out electricity to about one-third the city. This affected approximately 130,000 residents as well as forcing some businesses to temporarily close.

There are a number of videos on social media that show Waymo robotaxis at intersections with their hazard light on, as the traffic lights have stopped working because of an outage.

Waymo's self-driving cars are capable of handling dark traffic signals in four-way stop areas, but may request confirmation checks from time to time.

Waymo stated that "while we were able to successfully navigate more than 7,000 darkness signals on Saturday, this?outage caused a concentration of?these requests." This created a backlog which, in some instances, contributed to response delays, contributing to congestion.

Waymo says that the protocols were appropriate during the early stages of deployment, but they are now being refined to fit the current size of the company. Waymo has implemented fleet-wide updates to provide vehicles with "specific context for power outages, allowing them to navigate more decisively."

Waymo said that it would also improve its emergency response protocol by incorporating the lessons learned from this incident.

Waymo has announced that it will resume its ride-hailing services in the San Francisco Bay Area. The company, which operates a fleet of over 2,500 vehicles, is located?in Los Angeles, Metro Phoenix Arizona, Austin Texas, and Atlanta Georgia.

California Public Utilities Commission announced on Monday that it is reviewing the issue of Waymo vehicles stuck in traffic. The CPUC and California's Department for Motor Vehicles regulate and issue permits for robotaxi testing and commercial deployment.

Waymo issued an update to its software earlier this month after Texas officials said that the vehicles had illegally passed at least 19 school buses since the beginning of the school year. The National Highway Traffic Safety Administration opened an investigation into the matter in October. (Reporting and editing by Christian Schmollinger in Washington, Kanishka Singh and David Shepardson from Washington)

(source: Reuters)