Photo from NTSB’s preliminary report of the Tesla Model S involved in the crash.

NTSB says Tesla in fatal crash involving tractor-trailer was speeding

A preliminary report issued last week by the National Transportation Safety Board on the fatal July crash involving a Tesla Model S using the self-driving Autopilot mode and a full-length tractor-trailer determined the Tesla was traveling 9 mph over the posted 65 mph speed limit.

The driver of the Tesla died in the crash. As CCJ reported last month, the Tesla hit a tractor-trailer that was crossing the road in front of the car. The Tesla was in its autonomous Autopilot mode, and the car maker said the white trailer disappeared into the bright sky behind it, causing the system to not detect the large vehicle in front of it.

“The car’s system performance data revealed the driver was using the advanced driver assistance features Traffic-Aware Cruise Control and Autosteer lane keeping assistance,” NTSB says in its preliminary report. “The car was also equipped with automatic emergency braking that is designed to automatically apply the brakes to reduce the severity of or assist in avoiding frontal collisions.”

The truck involved in the crash was a 2014 Freightliner Cascadia day cab. It was towing a 53-foot dry van trailer.

The trailer’s “white side…against a brightly lit sky” caused the car’s Autopilot system to fail to register the full-sized tractor-trailer crossing the highway, Tesla said … read more at ccjdigital.com