Motorsports encompasses many types of vehicle racing and non-racing activities involving motorized vehicles. There are various categories of motorsports including single-seater racing, international car racing championships, national racing series, rally racing, drag racing, and land speed racing. Motorsports events can take place on closed road courses, off-road areas, or involve point-to-point racing where competitors race between checkpoints. The types of vehicles involved range from modified street-legal production cars to purpose-built racing cars, and rules regarding starts and top speeds vary between classes.