GREEN: Waved at the start of the race, practice or qualifying session, or at the restart following a full-course caution.

RED: Displayed at start/finish to stop the race or session for safety reasons or because of weather conditions. All competitors must proceed to the pits and be prepared to stop at any time.

YELLOW: When held stationary at any of the flag stations around the track, it means there is danger and to slow down and keep your track position in that part of the track due to an incident in the area. A waving yellow also signifies extreme danger and/or course workers on the course.

DOUBLE YELLOW: Signifies a full course caution when displayed at Start/Finish or around the course. All cars must slow and maintain their position in line behind the pace car.

YELLOW FLAG WITH RED STRIPES: Displayed when there is a slippery surface or debris on the track.

BLUE: Alerts drivers that faster traffic is approaching. If waved, the competitor must give way to the driver trying to pass.

BLACK: When displayed to field, competitors must proceed to the pits. A black flag displayed to a single competitor indicates that a driver must report to the pits immediately due to a rule infraction; if displayed to a competitor in a furled manner, the competitor is warned to discontinue an act of unsportsmanlike conduct or they will be penalized. Stationary black flags are held around the course when the red flag is displayed at start/finish, warning drivers that they are to reduce speed, head to the pits and may be stopped at any time.

BLACK WITH ORANGE DISK (MEATBALL): Driver must report to the pits due to a mechanical problem.

WHITE: Waved at Start/Finish with one lap to go; when held stationary, indicates an emergency vehicle on the course or a much slower race car ahead.

CHECKERED: Waved at the finish of the race, practice or qualifying session.