Waymo Resumed Autonomous Operations in San Antonio
The service returns following software updates designed to prevent vehicles from entering flooded roadways.
Updated on Sept. 24, 2026 in Robotics
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Waymo has resumed its autonomous vehicle operations across a 60-square-mile area in San Antonio after a five-month pause. The service had previously suspended activities in April 2026 due to safety concerns regarding vehicle performance in heavy rainfall.
Why it matters
The return of the fleet marks a critical test for autonomous navigation systems operating in regions prone to sudden, localized environmental hazards. By integrating more robust flood-risk data, the company aims to address the specific performance failures that prompted the initial service shutdown.
The fleet now operates across a 60-square-mile zone, with observed costs reaching $20.28 for a 2-mile round-trip. It remains unknown exactly how many vehicles are currently deployed compared to the pre-suspension fleet size.
The players
Waymo
An autonomous driving technology company that develops a hardware and software stack for Level 4 self-driving vehicles.
The details
Waymo mitigated the flooding risks by integrating first, second, and third-party data to identify high-risk flood zones within San Antonio. The fleet now utilizes updated software triggers and alerts that force a change in operational behavior when heavy rainfall is detected. These adjustments follow a spring incident where an unoccupied vehicle entered a flooded road and was swept into Salado Creek.
Timeline
February 2026: Waymo vehicles first arrived in San Antonio.
Spring 2026: An unoccupied vehicle entered a flooded roadway near Salado Creek.
April 2026: Waymo paused service in San Antonio due to safety concerns.
September 2026: Waymo resumed operations in San Antonio.
Coming weeks: Waymo will gradually add more riders from its waitlist.
The Tech Race
Waymo is working to demonstrate that its autonomous navigation systems can reliably adapt to localized climate risks without compromising service consistency. This deployment follows a path set by the National Weather Service's flash flood guidance metrics to harden fleet operations against regional weather patterns.
Access to the service is currently limited to previous users via an early access feature. The company plans to gradually welcome additional riders from its waitlist in the coming weeks, though a timeline for full public access has not been finalized.
The takeaway
The return of the service signals a growing maturity in how autonomous fleets handle environmental variables beyond standard traffic. Potential riders should monitor the waitlist status for updates on when the service will expand beyond the initial early access group.
Further reading
For more on the development of self-driving fleets, visit our Robotics section.
Source note: This article includes information reported by MySA.
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