Late Tuesday, the National Highway Traffic Safety Administration—the federal agency in charge of road safety in the US—took the unusual step of ordering a fleet of self-driving shuttles to stop carrying passengers. The shuttles, from the French company EasyMile, were transporting or preparing to transport riders in 16 US cities. NHTSA’s order allows the vehicles to continue operating on public roads, but bans them from allowing people to climb aboard.
The suspension comes after an incident in Columbus, Ohio, on Monday, when a shuttle operating on the street made an emergency stop. The vehicle was only traveling 7.1 mph, but the sudden stop caused a woman inside the vehicle to fall. She was reportedly transported to the hospital with minor injuries. Columbus is using two of EasyMile’s 12-passenger shuttles—which look a bit like toasters and move at maximum speeds of 12 mph—in a one-year experiment with autonomous vehicles.
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NHTSA’s move was puzzling because the agency generally has taken a hands-off approach to autonomous vehicles. Self-driving vehicles testing in California and Arizona have been involved in plenty of crashes, mishaps, and fender-benders, with one resulting in the death of an Arizona woman and others in minor injuries. But—in part because vehicle operation is overseen by states—NHTSA has not intervened. Tesla’s Autopilot feature, which is not self-driving but can take over some driving tasks on highways, has been involved in several fatal crashes across the US. But NHTSA has thus far allowed the feature to operate on public roads even as it’s launched 14 investigations into Autopilot-related incidents.
NHTSA did intervene to stop a Florida demonstration project run by TransDev and involving EasyMile shuttles in 2018—but that’s because the agency alleged TransDev was using the shuttles as school buses, which must meet more rigorous vehicle standards.
“[NHTSA] has plenty of latitude to step in in other cases,” says David Friedman, a former interim head of the NHTSA who is now vice president of advocacy at Consumer Reports. “They’ve chosen not to.”
Most self-driving vehicles don’t need federal approval to operate, because they meet Department of Transportation design standards. (A self-driving Cruise is just a Chevy Bolt plus some sensors, though General Motors has asked NHTSA for an exemption to operate cars without steering wheels.) NHTSA seems to have had a clearer reason to intervene in the EasyMile case because it gave EasyMile, and its users, special permission to import the shuttle to the US.
Critics say that doesn’t add up. “It’s a disturbing inconsistency,” says Friedman. “NHTSA’s reaction to EasyMile should be the rule and not the exception.”
In a statement, a spokesperson for NHTSA said it would “continue to work with all affected parties, including EasyMile and local authorities, to evaluate potential future vehicle operations, consistent with applicable legal requirements and public safety.” The spokesperson did not estimate when or if the vehicles would be back on