Green Flag
- Start/Restart of Race
The solid green flag is usually displayed to indicate the start
of a race. It is often also shown at the end of a caution period
or a temporary delay to indicate that the race is restarting.
Yellow Flag - Caution
In auto racing, this flag always signals a caution condition.
When waved from the start tower, it places the entire track under
a caution condition and signals a pace car to enter the track
to control the field. A speed limit is imposed, and no passing
under any other circumstance may occur during a yellow-flag condition
The Blue Flag - Move over
The light blue flag, sometimes with a diagonal orange or yellow
stripe, informs a driver that a faster car is approaching and
that the driver should move aside to allow one or more faster
cars to pass. If the flag is waved, it indicates to the driver
that the fast car is on its tail.
Red Flag
- Stop Race
This flag, when displayed from the start tower, signals all drivers
to come to a complete stop, due to a severe hazard obstructing
the track. The red flag is displayed continuously until the hazard
is eliminated, at which point the starter displays the yellow
flag, signaling all drivers to resume motion.
Black Flag - Penalty of some form
In auto racing, the starter will wave the black flag from the
start tower to signal a particular driver to pull into the pits
and consult a race steward. The number of the car in question
is displayed from a bracket on the start tower
Black Flag with white (X) - No Longer Scored
This flag is used in the NASCAR auto racing circuit to signal
that a driver has been disqualified from the race.
White Flag - Final Lap
NASCAR, the flag is waved from the start tower to indicate that
the race leader has started the final lap of the competition.
Checkered Flag - End of Race
The most famous flag in auto racing, this flag is waved from the
start tower to announce the end of a race. The first driver to
pass this flag wins the race.