double file, and the Indianapolis 500 starts triple file. Restarts, however, are often only single file, but lapped cars may form a second line on the inside. Some short track ovals have a rule, adopted by NASCAR in June 2009, and IndyCar during the 2011 season only, where the restarts are all double file, with the leader's choice of inside or outside on the ensuing restart.

Virtually all restarts in motorsports are held as rolling starts for time constraints;