A vehicle equipped with an autonomous driving system includes a vehicle platform configured to execute vehicle control in accordance with commands from the autonomous driving system. The vehicle platform includes a base vehicle including an electric parking brake, and a vehicle control interface box configured to perform interfacing between the autonomous driving system and the base vehicle. An immobility command including one of a first value requesting immobilization of the vehicle, a second value requesting release of the immobilization of the vehicle, and a third value that makes no request, is transmitted from the autonomous driving system to the vehicle control interface box. The vehicle platform is configured to release the electric parking brake when acceleration of the vehicle is requested, in a case where the immobility command including the third value is received and the electric parking brake is in an activated state.