"On Saturday, videos shared widely on social media showed Waymo vehicles stopped mid-intersection with hazard lights flashing, forcing other cars to maneuver around them," reports the San Francisco Chronicle. The Independent notes that "Without working traffic lights, the driverless cars were seemingly left confused, with many halting in their tracks and causing major traffic jams. Local riders and pedestrians shared photos and videos of the vehicles stuck at intersections with long lines of drivers piling up behind them..."In some instances, several Waymos were piled up in front of a single intersection. "6 Waymos parked at a broken traffic light blocking the roads. Seems like they were not trained for a power outage," another social media user wrote. More from CNBC:San Francisco resident Matt Schoolfield said he saw at least three Waymo autonomous vehicles stopped in traffic Saturday around 9:45 p.m. local time, including one he photographed near Arguello Boulevard and Geary Street. "They were just stopping in the middle of the street," Schoolfield said. The power outages began around 1:09 p.m. Saturday and peaked roughly two hours later, affecting about 130,000 customers, according to Pacific Gas and Electric. As of Sunday morning, about 21,000 customers remained without power, mainly in the Presidio, the Richmond District, Golden Gate Park and parts of downtown San Francisco. PG&E said the outage was caused by a fire at a substation that resulted in "significant and extensive" damage, and said it could not yet provide a precise timeline for full restoration... Amid the disruption, TeslaCEO Elon Musk posted on X: "Tesla Robotaxis were unaffected by the SF power outage." Unlike Waymo, Tesla does not operate a driverless robotaxi service in San Francisco. Tesla's local ride-hailing service uses vehicles equipped with "FSD (Supervised)," a premium driver assistance system. The service requires a human driver behind the wheel at all times... The Waymo pause in San Francisco indicates cities are not yet ready for highly automated vehicles to inundate their streets, said Bryan Reimer, a research scientist at the MIT Center for Transportation and co-author of "How to Make AI Useful." "Something in the design and development of this technology was missed that clearly illustrates it was not the robust solution many would like to believe it is," he said. [He recommends "human backup systems in place around highly automated systems, including robotaxis."] State and city regulators will need to consider what the maximum penetration of highly automated vehicles should be in their region, Reimer added, and AV developers should be held responsible for "chaos gridlock," just as human drivers would be held responsible for how they drive during a blackout. Waymo did not say when its service would resume and did not specify whether collisions involving its vehicles had occurred during the blackout.Read more of this story at Slashdot.