
On the ensuing restart, a green and white flag are waved to signal one lap is remaining in the race. If a caution comes out during the final lap (after the white flag has been displayed), the race returns to yellow immediately.If the furled yellow flag with a downwards-pointed finger (one lap before restart in single file formation) is given with two laps remaining in the race, and the restart is on the final scheduled lap, the green and white flag will be waved together and the race will have only one lap remaining.If a caution comes out at any time during the first of the two laps, each subsequent restart will be a two-lap restart. If the final scheduled lap of the race is under caution when the green flag is waved for the restart attempt, there are two laps remaining in the race.The rules are arranged such that the checkered flag must wave under green flag conditions. In the ARCA Menards Series, there is a two-stage version of the rule. NASCAR officially adopted the term "NASCAR overtime" in 2016. For some years after 2007, NASCAR on Fox referred to the extra laps after the scheduled number as Overdrive, an allusion to the term overtime used in many other sports. The exact provisions vary between organizations. If a caution flag is shown within the specified number of laps of the scheduled finish, then the number of remaining laps will not be decremented until the green flag is shown again. The prescribed number of final laps is usually two.

checkered flag: shown at the finish of the race.white flag: shown at the start of the last lap.green flag: shown to start or restart the race.When the race distance is extended to accommodate such a finish, it is also sometimes known as an overtime finish. In North American auto racing, a green–white–checker finish ( GWC) is a racing restart procedure one in which the race is restarted from a caution period with 2 laps remaining.
