Cruise emits software patch after self-driving car slams into bus
Cruise pushed a software update to its fleet of 300 self-driving cars operating in San Francisco after one vehicle crashed into the back of a bendy bus.
On March 23, one of the upstart's driverless vehicles hit a Municipal Transit Authority bus when the car failed to detect the bus had decelerated and didn't brake in time. Nobody was injured in the accident; the car, which didn't have a human at the wheel and was under computer control, suffered minor damage to its front fender.
Cruise launched an investigation into the prang, and discovered its autonomous vehicle had struggled to correctly predict the Muni bus's driving behavior due to its bendy shape. Articulated buses, like those in San Francisco, have a stretch-accordion-like structure in the middle that connects two carriages.
When the bus pulled in front of Cruise's self-driving car and slowed down, the AI-powered vehicle incorrectly assumed the bus was still charging ahead, and wrongly predicted the motion of the rear carriage. The car continued to drive normally and failed to brake as required, causing it whack into the back of the bus.
"We quickly determined the bus's behavior was reasonable and predictable," Cruise founder and CEO Kyle Vogt"It pulled out into a lane of traffic from a bus stop and then came to a stop. Although our car did brake in response, it applied the brakes too late and rear-ended the bus at about 10 mph. We identified the root cause, which was a unique error related to predicting the movement of articulated vehicles like the bus involved in this incident.
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