Autopilot, which failed to identify the truck and never slowed the vehicle down, the NTSB said. But Brown and the truck driver bore some fault, as well, in the Florida crash, the agency said. The NTSB issued 1. Browns driving patterns. Brown relied too much on automation, and demonstrated a lack of understanding of system limitations, the agency said. Part of that, the NTSB indicated, had to do with Tesla. Qq. Mars two moons, Phobos and Deimos, are like the bay leaves of the solar system theyre fine I guess but what are they trying to do The larger satellite, Phobos. Tesla has repeatedly said in the past that drivers must keep their hands on the wheel and pay attention to the road if they enable Autopilot. But Tesla couldve taken additional steps to prevent misuse of Autopilot, which worked as designed, the NTSB said, but the feature was used in ways that werent intendedand that Tesla didnt go far enough to ensure drivers remained alert. Tesla has previously said to a separate federal regulator that it evaluated the potential for some drivers to become inattentive while using the feature. Tesla allowed the driver to use the system outside of the environment for which it was designed and the system gave far too much leeway to the driver to divert his attention, said Robert Sumwalt, the NTSB chairman. The truck driver, who refused to be interviewed by the NTSB, failed to yield the right of way to Brown, but the agency said both Tesla and the driver had at least 1. In a statement, a Tesla spokesperson said the safety of its customers comes first and Autopilot significantly increases safety, as the National Highway Traffic Safety Administration has found that it reduces accident rates by 4. The conclusion of that 4. We appreciate the NTSBs analysis of last years tragic accident and we will evaluate their recommendations as we continue to evolve our technology, the spokesperson said. How To Update Adobe Acrobat 9. We will also continue to be extremely clear with current and potential customers that Autopilot is not a fully self driving technology and drivers need to remain attentive at all times. Browns death drew worldwide attention as it was the first known fatal crash to involve a vehicle traveling on its own using semi automated technology. A preliminary report released earlier this year by the NTSB found that Brown kept his hands on the wheel of his 2. Model S7. 0D for only 2. Autopilot at 7. 4 mph. The vehicle gave numerous audio and visual warnings before the crash. Tesla CEO Elon Musk said himself that a later update to Autopilotimproving the systems ability to differentiate a truck from a signvery likely wouldve prevented the crash. The NTSB staff said that Brown was knowledgable about the vehicle, but that the Tesla user manual offered sometimes conflicting accounts. A driver could have difficulties interpreting which roads it might be appropriate to use Autopilot, Ensar Becic, an NTSB human performance investigator, said during the hearing. The NTSB also found that relying on sensors that determine whether a drivers hands are on a steering wheel isnt an effective method of determining whether theyre paying attention. Above all, the NTSBs 8. The Tesla Model S was not a fully self driving car, stressed Sumwalt, the NTSB chairman, in a warning call of sorts to consumers. Its a long way from partially automated vehicles to self driving cars, he said. And until we get there somebody still has to drive.