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In North American motorsport, a green–white–checker finish is one in which no yellow caution flag is shown during the final laps. Many race rules require a green–white–checker finish, because no competition may take place, including no passing, while a caution flag is showing. The name alludes to three racing flags: * green flag: shown to start or restart the race. When no caution is in force the race is said to be "under green flag conditions", although in fact the green flag does not remain flying continuously. * white flag: shown at the start of the last lap * checkered flag: shown at the finish line The prescribed number of final laps is usually two, but may be as many as ten. If a caution flag is shown within that 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 exact provisions vary between organisations. 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. ==ARCA== In the ARCA Racing Series, there is a two-stage version of the rule. The rules are arranged such that the checkered flag must wave under green flag conditions. *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. 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 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 during the final lap (after the white flag has been displayed), the race returns to yellow immediately. On the ensuing restart, a green and white flag are waved to signal one lap is remaining in the race. Should a yellow flag wave before the leader crosses the finish line, the race will continue under yellow until the restart, which again is one lap. Such a format allows an unlimited number of attempts at a green flag finish. During the event at Gateway International Raceway on July 28, 2006, 22 laps (27.5 miles) were added to the 120-lap (150-mile) scheduled distance. This version, or a similar variant with no green/white rule, is used in most short tracks. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Green–white–checker finish」の詳細全文を読む スポンサード リンク
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