Waymo San Francisco Outage Halts Robotaxis, Service Resumes
Waymo San Francisco outage Dec. 20, 2025, knocked out traffic signals and 5G, stalling robotaxis and raising scrutiny of fleet resilience and redundancy.
KEY TAKEAWAYS
- Power outage knocked out traffic signals and 5G, causing Waymo robotaxis to stall and block intersections.
- Service was suspended Dec. 20 and resumed Dec. 21 in the Bay Area.
- A California regulator opened a review, highlighting fleet resilience and network redundancy risks.
HIGH POTENTIAL TRADES SENT DIRECTLY TO YOUR INBOX
Add your email to receive our free daily newsletter. No spam, unsubscribe anytime.
Waymo, Alphabet’s autonomous-vehicle unit, suspended robotaxi service in San Francisco on Dec. 20, 2025, after a power outage disrupted traffic signals and 5G connectivity, causing vehicles to stall at intersections. The unit resumed operations the next day as a California regulator opened a review of the incident.
Traffic Signals and 5G Disruption
A widespread power failure in San Francisco knocked out traffic signals and disrupted 5G networks that support vehicle connectivity. This left some Waymo cars without the external network links they rely on, producing a concentrated robotaxi outage. The incident exposed a resilience gap for autonomous fleets dependent on urban infrastructure and a single network-access technology.
Service Suspension and Regulatory Review
Stalled vehicles blocked intersections and caused traffic congestion, though no accidents or injuries were reported. Waymo temporarily suspended service and resumed it across the San Francisco Bay Area on Dec. 21. Social-media videos showed stationary vehicles during the outage. A California regulator is reviewing the incident, raising questions about operational safeguards for autonomous services in dense urban corridors.
The episode highlighted how failures in public utilities and commercial networks can cascade into transport disruptions as autonomous platforms scale. It also focused attention on the need for redundancy in communications and power systems that robotaxi deployments depend on.
