San Francisco leaders have questioned Waymo's response to a major power outage in December that left driverless cars stalled in intersections and blocked emergency crews and public transit. The outage, triggered by a fire at a PG &E substation, knocked out power to about a third of the city and caused widespread traffic disruption. City officials cited Waymo data showing nearly 1,600 vehicle stoppages lasting at least two minutes during the outage. Over 60 Waymo vehicles had to be manually moved. The hearing was attended by union workers and rideshare drivers, raising concerns about job losses and public safety. Waymo officials took responsibility for the communication gaps and outlined changes designed to prevent a repeat.