A special stage (SS) is a section of closed road at a stage rally event. Racers attempt to complete the stage in the shortest time. A race on a special stage is coordinated such that each competing racer begins after a set interval, to reduce the chance of impedance by other competitors. Each special stage is a relatively short section, usually up to about 30 miles in length. A rally usually comprises approximately 15–30 special stages. The driver with the lowest overall time for all special stages in an event is the winner.