Mass malfunction of Baidu robotaxis halts traffic in Wuhan City, China

In a vivid demonstration of the vulnerabilities within centrally managed autonomous fleets, a massive "system malfunction" involving Baidu’s Apollo Go robotaxis brought traffic in the central Chinese city of Wuhan to a standstill.

Editorial credit: Poetra.RH / Shutterstock

The incident, which began on the evening of March 31, 2026, left more than 100 driverless vehicles frozen in place on major ring roads and elevated highways, trapping passengers in live traffic for hours.

Local police and traffic authorities were flooded with distress calls as white Apollo Go SUVs abruptly entered a "fail-safe" mode, stopping in fast lanes and at busy intersections. While no fatalities were reported, the sudden paralysis created chaotic scenes as human drivers were forced to weave around the stationary "digital obstacles" during the height of the evening commute.

Trapped on the Third Ring

For passengers inside the vehicles, the technical glitch quickly turned into a harrowing experience. Mr. Lu, a local resident, reported being stranded on the Third Ring Road, an elevated highway, for nearly two hours while heavy trucks sped past on both sides.

"The car just stopped dead in the middle of the road," Lu told local media. "I tried the in-car SOS button, but it was completely unresponsive. I felt like a sitting duck. I eventually had to call the police because the company’s customer service line was either busy or automatically disconnecting."

Other riders shared similar stories on social media platforms like Douyin and Weibo, posting videos of unresponsive in-car tablets and "vehicle problem" warnings. In some instances, passengers were so intimidated by the surrounding high-speed traffic that they refused to exit the vehicles until police arrived to escort them to safety.

The risk of "correlated failure"

Industry experts are pointing to the event as a textbook case of "correlated failure." Unlike human-driven cars, where an error typically affects only one vehicle, a software bug or network interruption in a cloud-connected fleet can cause every vehicle to fail in the exact same way at the exact same moment.

Preliminary investigations suggest the "system malfunction" was triggered by a network-wide update that caused the vehicles' perception modules to lose synchronization with Baidu’s central command. As a safety precaution, the cars were programmed to "freeze" rather than risk uncoordinated movement, effectively turning the fleet into a series of roadblocks.

Impact on the "robotaxi capital"

The outage is a significant PR blow for Wuhan, which currently serves as the world’s largest testing ground for autonomous ride-hailing with over 1,000 fully driverless vehicles in operation. Baidu has been targeting profitability for its Apollo Go division this year, but this mass "paralysis" has reignited fierce debate over the maturity of the technology.

The company has yet to release a full technical post-mortem, but the Wuhan police have confirmed they are working with the company to ensure "stricter redundancy protocols" are in place. The incident follows similar, though smaller, fleet stalls by Waymo in San Francisco, suggesting that as robotaxis scale globally, the infrastructure to manage their recovery must keep pace with the AI driving them.