The National Transportation Safety Board investigation said in April 2018 that Huang’s car was following a vehicle at about 65 miles per hour until it turned to the left, according to NTSB’s preliminary review of the data. As the car drove toward the median, it did not brake—rather, it accelerated from 62 miles per hour to 70.8 miles per hour in the three seconds leading up to the collision, NTSB said.

In a blog post published a week after the crash, Tesla said that the car gave Huang one audible alert and several visual alerts throughout his drive that morning, and the car detected that his hands were not on the wheel for the six seconds leading up to the wreck. “The driver had about five seconds and 150 meters of unobstructed view of the concrete divider with the crushed crash attenuator, but the vehicle logs show that no action was taken,” the blog states.

“Tesla Autopilot does not prevent all accidents—such a standard would be impossible—but it makes them much less likely to occur,” the company’s blog post continues. “It unequivocally makes the world safer for the vehicle occupants, pedestrians and cyclists.”


In a statement sent to several media outlets a lawyer representing Huang’s family, B. Mark Fong, said Huang’s crash occurred because “Tesla is beta testing its Autopilot software on live drivers.”

The lawsuit was filed a week after Tesla CEO Elon Musk announced his plans to put one million automated taxis on roads by 2020.