Waymo has recalled almost 3,900 robotaxis in the US after a software error could let them enter construction zones. Discover the impact on autonomous-vehicle safety and what’s next.
Waymo, Alphabet’s self-driving unit, announced a new recall of 3,871 robotaxis across California and Arizona after a software glitch was found that could allow the vehicles to drive into active construction zones.
Why the recall matters
The issue stems from the cars’ inability to correctly recognise road-closure signs at highway on-ramps. In several incidents recorded since early April 2026, the autonomous fleet mistakenly entered areas where workers and equipment were present, creating a potential safety hazard.
Immediate actions taken
Waymo temporarily limited its robots’ highway operation while engineers rolled out an over-the-air software update. The patch improves sign detection and adds stricter safeguards to keep the cars out of construction zones.
Recent recall history
This is the second major recall in just over a month. In March, Waymo pulled roughly 3,800 robotaxis after a different software fault caused some units to exceed safe speeds on water‑logged roads, risking loss of control. Earlier, a Waymo vehicle entered a flooded lane in San Antonio, Texas, during extreme weather – an event that prompted a broader safety review.
Ongoing investigations
The U.S. National Highway Traffic Safety Administration (NHTSA) is actively investigating a January 2026 incident in Santa Monica where a Waymo car struck a child near an elementary school, causing minor injuries. The National Transportation Safety Board (NTSB) is also probing a separate claim that a Waymo vehicle ran a stopped school bus with its warning lights activated.
What this means for autonomous mobility
While Waymo’s technology has advanced rapidly toward commercial deployment, these back‑to‑back incidents highlight lingering challenges. Handling unexpected road conditions—such as construction zones, extreme weather, or atypical traffic signals—remains a critical hurdle for any self‑driving service.
Waymo says it remains committed to improving safety and plans to resume full service once the updates are validated.