Baidu's Robotaxis Froze on a Major Highway, Trapping Passengers and Blocking Traffic

A fleet-level software failure knocked dozens of Baidu Apollo robotaxis offline simultaneously during peak commute hours Tuesday, triggering a cascade of disruptions that included passengers locked inside non-responsive vehicles, autonomous cars stalled on highway lanes, and at least one rear-end collision attributed to the sudden stoppage, according to local media reports corroborated by social media footage reviewed by The Verge.

What Happened

The incident appears to have originated from a connectivity failure that triggered the robotaxis' default safety mode — stopping the vehicles in place rather than pulling over. Under normal circumstances, connectivity loss for a brief period should prompt a controlled pullover maneuver. The simultaneous nature of the failures across dozens of vehicles suggests a backend infrastructure issue rather than individual hardware faults in specific cars.

Passengers in multiple vehicles reported being unable to open doors manually during the initial phase of the failure, a function typically controlled by the same onboard computer system that governs vehicle operation. Baidu confirmed the incident in a statement and said passenger exits were restored within 12 minutes of the initial failure. A full engineering post-mortem is underway.

The Regulatory Stakes

Baidu's Apollo robotaxi service operates under permits from China's Ministry of Industry and Information Technology and local municipal authorities in Wuhan, Chongqing, and several other cities. Those permits allow fully driverless commercial operation — no safety driver — in designated geofenced zones. The current incident occurred in one of those zones.

Chinese regulators have generally been more permissive than their U.S. counterparts in allowing robotaxi commercial deployment at scale. The Baidu incident will test whether that permissiveness has limits. If the investigation reveals that the failure mode — fleet-wide simultaneous stoppage on a highway — was a known edge case with inadequate fallback design, the regulatory response could be material.

Waymo Context

The comparison to Waymo's incident record in San Francisco is instructive, if imperfect. Waymo has logged millions of miles of commercial robotaxi operation in the U.S. with a safety record that, by most metrics, compares favorably to human drivers. Waymo has also experienced software-related incidents — including a multi-vehicle pileup following an emergency responder scene in 2023 — but fleet-wide simultaneous stoppages of this scale have not been publicly reported.

The difference in incident type matters: most AV incidents are single-vehicle edge case failures. A fleet-level failure indicates a different category of risk — one rooted in backend infrastructure and fleet management software rather than individual vehicle perception or decision-making. That category requires a different safety framework to address.