Formula 1 flags: what each one means
A clear guide to Formula 1 flags, from green and yellow to red, blue, black-and-orange, white and chequered, and what each means on track.
Formula 1 flags are the clearest on-track signals for drivers, telling them when to race, slow down, yield, stop or finish the session. They are shown by marshals around the circuit and backed up by light panels and cockpit messages, but the meaning of each flag remains the same.
Green and yellow flags
The green flag means the track is clear and normal racing conditions apply. Marshals use it to show that a hazard or restriction has ended, so drivers can resume racing speed and overtaking from that point.
A yellow flag warns of danger ahead. Drivers must slow down and they must not overtake. That applies whether the issue is a stopped car, debris, or marshals working near the track.
Double yellow flags signal a more serious hazard. In practice, the instruction is stricter because the danger is greater, but the core message is unchanged: slow down significantly, be prepared to change direction or stop, and do not overtake.
Red and blue flags
A red flag stops the session entirely. When it is shown in practice, qualifying or a race, drivers must reduce speed and return as directed under the procedures in force, and no competitive running resumes until race control restarts the session.
The blue flag is used when a faster car, usually a leader, is catching a slower car to lap it. It tells the slower driver to let that car through without holding it up. In Formula 1, blue flags matter most in races when backmarkers are about to be lapped, though they can also appear in practice and qualifying when drivers need to avoid impeding others.
Black, white and chequered flags
The black flag is one of the most severe signals in Formula 1. It is shown with a driver's number and orders that driver to return to the pits, normally because they have been disqualified from the session or race. By contrast, the black flag with an orange disc, often called the black-and-orange flag, warns a driver that their car has a mechanical problem that could be unsafe. That driver must come in so the issue can be fixed.
The white flag warns drivers that a slow vehicle is on track ahead. That could be a Formula 1 car with a problem, a recovery vehicle, or another authorised vehicle moving at much lower speed than normal racing pace.
The chequered flag marks the end of the session. In practice and qualifying, it ends running at the scheduled finish. In a race, it signals that the winner has completed the full distance, or that the classified distance has been completed if the race ends early under the rules.