NHTSA to investigate Tesla Model S Autopilot crash that killed driver: UPDATED

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Tesla Model S Autopilot engaged during cross-country record attempt

Tesla Model S Autopilot engaged during cross-country record attempt

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The NHTSA said it would open an investigation into a fatal May 7 crash in which a Tesla Model S running under Autopilot control hit a semi and passed under its trailer.

The driver, later identified as 40-year-old Joshua Brown of Ohio, died at the scene of the Florida crash, which occurred after a tractor-trailer rig turned left in front of him.

According to Tesla, the incident occurred because "neither Autopilot nor the driver noticed the white side of the ... trailer against a brightly lit sky, so the brake was not applied."

DON'T MISS: Let's be clear: Tesla's Autopilot is not a 'self-driving car'

Ironically, Brown had posted several videos of his Model S running on Autopilot, and credited the system for averting an earlier crash and potentially saving his life.

The NHTSA investigation was reported yesterday morning by Reuters.

The news agency quoted the National Highway Traffic Safety Administration as saying it would investigate 25,000 Tesla vehicles equipped with Autopilot software.

UPDATE: The truck driver involved in the accident claims that Brown was watching a movie while driving. The Florida Highway Patrol said it had found an aftermarket digital video disc player in the wreckage.

Tesla Autopilot Test

Tesla Autopilot Test

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The police blotter describes the accident as follows:

On May 7 at 3:40 p.m. on U.S. 27 near the BP Station west of Williston, a 45-year-old Ohio man was killed when he drove under the trailer of an 18-wheel semi. The top of Joshua Brown’s 2015 Tesla Model S vehicle was torn off by the force of the collision. The truck driver, Frank Baressi, 62, Tampa was not injured in the crash.

The FHP said the tractor-trailer was traveling west on US 27A in the left turn lane toward 140th Court. Brown’s car was headed east in the outside lane of U.S. 27A.

When the truck made a left turn onto NE 140th Court in front of the car, the car’s roof struck the underside of the trailer as it passed under the trailer. The car continued to travel east on U.S. 27A until it left the roadway on the south shoulder and struck a fence.

The car smashed through two fences and struck a power pole. The car rotated counter-clockwise while sliding to its final resting place about 100 feet south of the highway. Brown died at the scene.Charges are pending.

CHECK OUT: Tesla CEO Musk Seeks 'Hardcore' Engineers To Beef Up Autopilot Software (Nov 2015)

Tesla Motors posted a blog entry, A Tragic Loss, on its website yesterday in response to the news of the NHTSA investigation.

It notes that Brown's death is the first fatality in more than 130 million miles driven while Autopilot was activated, and that the national fatality rate is one death every 94 million miles driven.

The post stresses the fact that the Autopilot software is still in a "public beta" development phase and requires drivers to remain alert and ready to resume control at any time.

Tesla Model S Autopilot system

Tesla Model S Autopilot system

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Specifically, Tesla wrote:

It is important to note that Tesla disables Autopilot by default and requires explicit acknowledgement that the system is new technology and still in a public beta phase before it can be enabled.

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