Green
Start of Race
Yellow
The yellow flag is used when hazardous conditions are present on the track. Once the yellow flag is displayed, drivers cannot advance positions on the track. Laps made under yellow flag conditions do not count in the total number of race laps.
Red
The red flag is used when track conditions become too severe for cars to continue circling the track. The red is automatically displayed any time a race car flips.
Black
The black flag is a consolation flag, indicating that the driver must report to the pit steward immediately. The black flag is used when a driver violates a track rule or has an safety issue that needs checked before returning to the race.
White
The white flag indicates there is one lap to go in the race.
Checkered
The checkered flag indicates the race is complete.
Crossed Flags
The flagman will take two furled flags and cross them to indicate to the drivers that the race has reached its halfway point. Half of the scheduled laps have been completed and half of the scheduled laps remain.