The investigation into the Tesla autopilot death crash has concluded

The investigation was closely watched by automakers who are introducing semi-autonomous features and pursuing fully self-driving vehicles.

An investigation was opened shortly after the crash, on June 28, 2016, meaning that it lasted for over six months.

The NHTSA noted the systems "are not created to reliably perform in all crash modes, including crossing path collisions".

Joshua Brown died in May when his Tesla (TSLA) Model S drove under a tractor-trailer truck that was turning left in front of him.

Investigations into the matter revealed that the driver was speeding and there is a huge chance that he was watching a Harry Potter movie on his portable DVD player at the time of the crash. It found only two of those incidents - the Florida and Pennsylvania crashes - involved fatal injuries.

Now that Tesla's Elon Musk has proven it is possible to create an electric autonomous vehicle, traditional auto makers and other startups are looking to follow a similar path.

The fatality is the first to occur when the autopilot feature was activated, Tesla said in a blog post.

"A safety-related defect trend has not been identified at this time and further examination of this issue does not appear to be warranted", NHTSA states, referring to the closing of the investigation. With such complex and advanced functionality, there are surely less chances for the Autopilot system to be responsible for the crash. In Tesla's case, people had filmed themselves going hands-free after activating Autopilot.

Tesla says drivers working in conjunction with its Autopilot technology are safer than those without it.

Tesla's Autopilot had no defects in it at the time of a fatal crash that spurred much criticism of the driver assistance system. "The potential for driver misuse was evaluated as part of Tesla's design process and solutions were tested, validated, and incorporated into the wide release of the product". In reviewing how Tesla warns it drivers about the need for attention to the road, the NHTSA took into account a software update the company pushed in September 2016 that adjusted how quickly the vehicle would warn the driver if their hands were not on the wheel. Instead, the agency found data that supports Tesla CEO Elon Musk's assertions that Autopilot is preventing accidents and even saving lives. The updated system temporarily prevents drivers from using the system if they do not respond to audible warnings to take back control of the vehicle.

At Tesla, the safety of our customers comes first, and we appreciate the thoroughness of NHTSA's report and its conclusion.

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