Flags, measuring 30 inches by 30 inches, have the following meanings:
- GREEN: Start of race.
- WHITE: One lap to go until finish. (courtesy flag)
- YELLOW: Caution. When a yellow flag is displayed, competitors must ride cautiously until they have passed the incident that caused the flag. When displayed there is no passing or gaining an advantage and jumps must be rolled between the flag and the incident that caused the yellow flag. Failure to do so may result in loss of positions or disqualification, subject to the referee’s discretion.
- At the AMA Amateur National Motocross Championship and the AMA Amateur Arenacross National Championship a rider may jump and pass between the yellow flag and the incident but must show caution. Failure to show caution may result in the rider being docked from one finishing position to a disqualification from the event, subject to the referee’s discretion.
- BLACK WITH 1-INCH WHITE BORDER: Disqualification of a rider. That rider must report to the referee at once.
- BLUE: Indicates you are about to be overtaken by faster riders. Hold your line and don’t impede their progress.
- WHITE WITH RED CROSS: Indicates that ambulances, safety vehicles or emergency personnel may be on the course. Competitors must show extreme caution, slow down, maintain position, not gain an advantage and wheels of the motorcycle must not leave the ground between the flag and the incident. Failure to do so may result in loss of position or a disqualification, subject to the referee’s discretion.
- BLACK AND WHITE CHECKERED: End of race. (Checks are 5 inches square.)
- RED: Stopping of a race for any emergency situation. Return cautiously to the starting line and wait for instructions.