Waymo — Phoenix, USA

Location

Phoenix, USA — urban arterial / major intersection

8-lane road, Phoenix metropolitan area

Description

A Waymo robotaxi attempted to cross an 8-lane road without an adequate gap in oncoming traffic. The vehicle committed to the crossing maneuver but stopped in the middle of the road, blocking multiple lanes of oncoming traffic. Passengers inside the vehicle were screaming in distress as vehicles approached at speed. The robotaxi remained frozen in the exposed position for an extended period before eventually completing the crossing. The incident was captured on video by passengers and went viral, illustrating the terror experienced when an ADS makes a dangerous decision that passengers cannot override.

Impact

Traffic disruption: severe

Emergency Response

Resolution: vehicle eventually completed crossing autonomously

Root Cause

gap acceptance / decision making

Planning module committed to a multi-lane crossing without sufficient gap in oncoming traffic; vehicle then froze mid-crossing rather than accelerating through or reversing, creating maximum exposure to collision risk

⚠️ Unconfirmed / Under investigation

Systemic Issues

• Gap acceptance algorithm failed for high-speed multi-lane crossing scenario
• Commit-then-freeze behavior is the worst possible outcome for mid-road exposure
• Passengers had no ability to override the dangerous decision
• Remote intervention latency incompatible with seconds-critical danger
• 8-lane crossings may require dedicated handling or avoidance in route planning
• Passenger psychological trauma from loss of control in dangerous situation

Regulatory Action

Arizona DOT reviewed the incident. No formal enforcement action. Incident cited in federal discussions about passenger override capabilities.

Sources

• Waymo Robotaxi Tries to Cross 8 Lanes - Autoblog