Zoox has temporarily suspended its autonomous vehicle test fleet in Atlanta after a series of incidents where workers reported symptoms consistent with gas exposure. The exact culprits remain unclear, with potential suspects including carbon monoxide, carbon dioxide or hydrogen sulfide. Despite tests, the company has yet to confirm the presence of any noxious fumes in their vehicles.

The OSHA has launched an investigation following a complaint from one of the contractors, who also reported feeling unwell after being sent back to work despite his condition. This latest setback comes as Zoox expands its operations in cities like Las Vegas and San Francisco, aiming to compete with Waymo. The company has promised to add CO2 monitors to its vehicles, but the incident has raised questions about the safety of autonomous testing.

While the exact nature of the problem remains uncertain, the incident highlights the risks associated with the rapid expansion of autonomous technology. The National Highway Traffic Safety Administration has previously investigated similar cases, but this is the first significant incident reported directly by Zoox’s own workers. The company’s response has been cautious, with a focus on thorough investigation and safety measures.

Around 40 workers may have been affected, and the facility has operated at limited capacity since the incidents. Zoox has assured that its purpose-built electric robotaxis, which are not involved in the tests, continue to operate normally. The incident underscores the complex challenges of testing autonomous vehicles, especially in an expanding market where rapid growth can compromise safety protocols.