A car that can steer, accelerate, decelerate, stop and change lanes without human intervention. Semiautonomous vehicles are able to keep in lane and even change lanes, and they may also be able to park themselves, but they are not driverless. In most cases, drivers must keep their hands on the wheel at all times. As of 2017, many automobiles including Tesla, GM, BMW, Mercedes, Infinity, Lexus, Volvo and Nissan have some of these functions as standard equipment or as options. See autonomous vehicle and collision avoidance system.