The report said that despite upgrades to the system, Tesla did not incorporate such protections. Tesla has said that Autopilot and automatic emergency braking are driver-assist systems, and that drivers are told in the owner's manual that they must continuously monitor the road and be ready to take control if necessary. In January of 2017, NHTSA ended an investigation into the Gainesville-area crash, finding that Tesla's Autopilot system had no safety defects at the time. But the agency warned automakers and drivers not to treat the semi-autonomous driving systems as if they could drive themselves. Semi-autonomous systems vary in capabilities, and Tesla's system can keep a car centered in its lane and away from other vehicles. It can also change lanes when activated by the driver. The NTSB likely will incorporate the Delray Beach crash into other investigations from last year involving Tesla vehicles. Investigators are probing a fatal March 2018 crash involving a Tesla SUV near Mountain View, California.