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https://www.productionai.institute/graph/events/evt-aiid-1326

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Production AI Institute public record · AI Incident Database: Waymo Robotaxis Allegedly Contributed to Traffic Gridlock During San Francisco PG&E Power Outage · observed 2026-04-04
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AI Incident Database: Waymo Robotaxis Allegedly Contributed to Traffic Gridlock During San Francisco PG&E Power Outage

Waymo's autonomous vehicle fleet reportedly contributed to traffic congestion in San Francisco after a PG&E substation fire cut power to nearly one-third of the city on December 20, 2025. As traffic signals went dark, Waymo vehicles requested remote confirmation checks at scale, creating delays that added to gridlock and prompted city officials to order the fleet off the road. Waymo later paused service and announced software and emergency-response updates.

AI Incident Database · Incident 1326

Operator lens (medium): inspect D4 (observability), D5 (model change gate), D6 (autonomy oversight).

Confidence
82%
Sources
3
Entities
8
Detected
detected 105d ago

Event summary

Waymo's autonomous vehicle fleet reportedly contributed to traffic congestion in San Francisco after a PG&E substation fire cut power to nearly one-third of the city on December 20, 2025. As traffic signals went dark, Waymo vehicles requested remote confirmation checks at scale, creating delays that added to gridlock and prompted city officials to order the fleet off the road. Waymo later paused service and announced software and emergency-response updates.

D4D5D6

Linked entities

  • waymo

    organisation | 70%

  • san-francisco-drivers

    organisation | 70%

  • san-francisco-road-users

    organisation | 70%

  • san-francisco-emergency-services

    organisation | 70%

  • emergency-responders

    organisation | 70%

  • general-public

    organisation | 70%

  • general-public-of-san-francisco

    organisation | 70%

  • waymo-passengers

    organisation | 70%

Related graph edges

EdgeTypeConfidence
ent-aiid-waymo to ent-psf-d4maps to60%
ent-aiid-waymo to ent-psf-d4maps to60%
ent-aiid-waymo to ent-psf-d4maps to60%
ent-aiid-waymo to ent-psf-d5maps to60%
ent-aiid-waymo to ent-psf-d5maps to60%
ent-aiid-waymo to ent-psf-d5maps to60%
ent-aiid-waymo to ent-psf-d6maps to60%
ent-aiid-waymo to ent-psf-d6maps to60%
ent-aiid-waymo to ent-psf-d6maps to60%
ent-aiid-waymo to ent-psf-d1maps to60%
ent-aiid-waymo to ent-psf-d1maps to60%
ent-aiid-waymo to ent-psf-d1maps to60%

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Event dates

  • Happened 20 Dec 2025

  • Detected 4 Apr 2026

Sources

  • AI Incident Database - Incident 1326

    secondary | checked 9 July 2026

    Open source
  • Autonomously navigating the real world: lessons from the PG&E outage

    secondary | checked 10 Jan 2026

    Open source
  • Waymo explains why robotaxis stalled during San Francisco blackout

    secondary | checked 10 Jan 2026

    Open source
Cite this record

"AI Incident Database: Waymo Robotaxis Allegedly Contributed to Traffic Gridlock During San Francisco PG&E Power Outage." https://www.productionai.institute/graph/events/evt-aiid-1326 (observed 2025-12-20; retrieved 2026-07-18). PAI.

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