U.S. auto safety regulators said Friday they have opened a formal safety probe into the autonomous driving system in vehicles produced by General Motors' robotaxi unit Cruise LLC.
in which self-driving Cruise vehicles "may engage in inappropriately hard braking or become immobilized."
The agency said while both issues "appear to be distinct, they each result in the Cruise vehicles becoming unexpected roadway obstacles." The safety agency's preliminary evaluation covers 242 Cruise autonomous vehicles and is the first step before it could seek a recall. The investigation follows reports of three crashes in which Cruise vehicles were struck from behind by other cars after the autonomous vehicles braked quickly.Cruise said it has "driven nearly 700,000 fully autonomous miles in an extremely complex urban environment with zero life-threatening injuries or fatalities....
NHTSA said it plans to fully assess the potential safety-related issues posed by these two types of incidents and will review "the commonality and safety logic of the hard braking incidents" and the "frequency, duration and safety consequences associated with the vehicle immobilization incidents.
The agency said it has three reports of Cruise vehicles automated driving system "initiating a hard braking maneuver in response to another road user that was quickly approaching from the rear. In each case, the other road user subsequently struck the rear of the ADS-equipped vehicle.
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