Waymo robotaxi drives onto Phoenix light rail tracks, passenger flees
A Waymo robotaxi drove onto light rail tracks in south Phoenix on Wednesday morning near an oncoming train, forcing its passenger to exit and flee to safety. The vehicle continued along the tracks before engaging reverse gear, causing brief disruptions to Valley Metro light rail service.
What happened
Shortly after 9 a.m. on Wednesday near the intersection of Central and Southern avenues in south Phoenix, a fully autonomous Waymo robotaxi operating without a human driver turned off the roadway and onto the city's light rail tracks.
Video footage shows the robotaxi stopped on the rails with hazard lights flashing as a train approached from behind. The passenger exited the vehicle and crossed to safety moments before the train arrived.
Once the passenger cleared, the robotaxi continued along the tracks for about 30 meters before engaging reverse gear as another train neared. Phoenix police were called to the scene but the Waymo had already cleared the tracks by their arrival.
Reported impact
No injuries were reported. Valley Metro light rail operations were briefly adjusted, with trains reversing direction and exchanging passengers to continue service.
The disruption was resolved within about 15 minutes with no significant delays.
Index analysis
Local technology experts point to recent construction in the area and new light rail infrastructure that may not yet be fully integrated into Waymo's mapping and routing systems. An earlier account described a Waymo passenger in Mesa becoming stuck on tracks after the vehicle took a detour to avoid construction.
Andrew Maynard, an emerging technology professor at Arizona State University, described the situation as an "edge case" where autonomous systems encounter unexpected scenarios that can confuse their decision-making.
Governance controls
Local authorities including Valley Metro confirmed they notified Waymo and managed rail operations to reduce impact. Waymo has not released a standalone statement directly addressing the incident.
Classification
Sources and evidence
This record was researched and written by the Index, based on the following original reporting.