Story perspectives

Waymo Enhances Systems After San Francisco Power Outage

12/28/2025

Summary

Story summary

Waymo is implementing significant software updates after a major San Francisco power outage disrupted its autonomous vehicle operations.
The outage was caused by a fire at a PG&E substation, affecting about one-third of the city.
Waymo's vehicles treated dark signals as four-way stops and faced a surge in confirmation requests.
The company paused services to avoid obstructing emergency responders and is enhancing emergency protocols and navigation during outages.

History

Historical Context

In October 2019, a series of power shutoffs by Pacific Gas and Electric (PG&E) affected over 3 million Californians, aimed at preventing wildfires amid high winds. This incident followed previous devastating fires, including the 2018 Camp Fire, which resulted in 85 fatalities. The outages exposed critical infrastructure vulnerabilities, prompting discussions on emergency protocols and the integration of technology in urban safety measures.

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Story summary

Waymo is implementing significant software updates after a major San Francisco power outage disrupted its autonomous vehicle operations.
The outage was caused by a fire at a PG&E substation, affecting about one-third of the city.
Waymo's vehicles treated dark signals as four-way stops and faced a surge in confirmation requests.
The company paused services to avoid obstructing emergency responders and is enhancing emergency protocols and navigation during outages.

1 / 2