A vehicular control system includes cameras and radar sensors disposed at an equipped vehicle. As the equipped vehicle travels forward along a traffic lane of a multi-lane road, the system, responsive at least in part to processing of image data captured by a forward-viewing camera and/or radar data captured by a forward sensing radar sensor, detects a leading vehicle traveling in the traffic lane that the equipped vehicle is traveling along. The system, responsive at least in part to processing of image data captured by a left-side camera or a right-side camera, detects another vehicle traveling in another traffic lane that is adjacent to the traffic lane along which the equipped vehicle is traveling. With the equipped vehicle operating in accordance with SAE Level 3, the system controls maneuvering of the equipped vehicle into the other traffic lane ahead of the other vehicle to pass the leading vehicle.