Car was on the highway braking hard with the ACC even if the vehicle in front was atleast 4/5 car lengths away. Moved to the right lane to stop it and came up to a box truck and the car automatically broke very hard and LKA started jerking the wheel to the left lane causing the rear bumper to collide with the cars in the next lanes front bumper. My vehicle pit maneuvered into the median ditch and flipped once.