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The Flags Of NASCAR

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The Blue Flag with an Orange Diagonal Stripe
NASCAR Blue Flag with Orange Diagonal St

Blue Flag With Orange Diagonal Stripe

This is the "courtesy" flag or the "move over" flag. It is the only flag that is optional. A driver may, at his discretion, ignore this flag.

It is displayed to a car (or group of cars) to let them know that the leaders are coming up behind them and that should be courteous and move over to let the leaders race.

Again, this flag is optional... However, NASCAR takes a dim view of anyone who repeatedly, and without a darn good reason, ignores it.

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