THE DRIVER WAS INVOLVED IN A FATAL ACCIDENT IN WHICH THE AUTO-PILOT AND/OR LANE-ASSIST FEATURES FAILED, CAUSING THE VEHICLE TO TRAVEL OUT OF ITS LANE AND INTO ONCOMING TRAFFIC WHILE TRAVELING WEST ON OSCEOLA POLK LINE ROAD EAST OF SULLIVAN ROAD IN FLORIDA. THE TESLA THEN COLLIDED WITH A VEHICLE IN ONCOMING TRAFFIC, KILLING THE DRIVER OF THE TESLA. FLORIDA HIGHWAY PATROL AND OSCEOLA COUNTY FIRERESCUE INVESTIGATED.