The appearance signals a clear course and indicates the immediate start or restart of a race.
Signals that a slow moving Competitor or Emergency Vehicle is on the course. Reduce speed and pass with care.
Single Stationary Yellow:
Slow down, no passing.
Single Waving Yellow:
Immediate danger, slow down, no passing.
Double Yellows: Slow down, no passing. The entire course is under Yellow conditions. Prepare for a safety car to enter the course.
Racing may commence after passing an incident and the next manned station is in view with no flag displayed.
Extreme Danger. Stop racing. Come to a controlled stop as quickly as possible to edge of track, within the driver's line of sight of a flag station. Proceed cautiously to the pits only upon indication from a corner worker.
Closed Flag (furled):
Signals "Warning" when pointed at a participant from the starters stand. Do not continue your action.
Open Flag (unfurled): Displayed with car number, participant must go immediately to the Black Flag Station in the pits.
Displayed At All Stations (black flag all):All Competitors Stop Racing. The session has been suspended. Proceed directly to the Pits. Do not take another lap.
Check your mirrors. Hold the line, another competitor is following closely or is trying to overtake.
Notifies the race or practice session is finished. Quit racing, cool your car down and return to the pits at the next opportunity.
