One yellow flag
A hazard beside the track or partly on it.
- Reduce speed noticeably
- No overtaking in that sector
- Be prepared to change direction
F1 Flags & Safety Car Guide
Yellow flags, VSC, Safety Car and Red Flag explained
Races get controlled all the time: a yellow flag here, a Virtual Safety Car there, sometimes a red flag. This guide explains what each of them means while you are watching.
- YELLOW Hazard on track Slow down, no overtaking
- VSC Virtual Safety Car Whole field slowed down
- SAFETY CAR Real car deployed Field formed up in a line
- RED FLAG Session suspended Running stops for now
Based on the FIA regulations
The flags you will actually see
Not every FIA flag is listed here. These are the ones that come up on a race broadcast, or that change what a driver is allowed to do.
- Green Flag Track clear The hazard is cleared and normal racing resumes.
- Yellow Flag Hazard There is a hazard on track. Slow down, no overtaking.
- Red Flag Session suspended The session is stopped. It is not the end of the race.
- Blue Flag Faster car approaching A faster car is coming. You have to let it past.
- Black & White Flag Warning A warning about driving standards, not a disqualification.
- Black Flag Disqualified The driver shown with the car number is disqualified.
- Chequered Flag Session over The session has finished.
How a race gets controlled
When something happens on track, race control has several tools. They are different measures, not steps on a ladder.
-
Local
Yellow Flag
Only the affected marshalling sector is neutralised. The rest of the lap keeps running at racing speed.
-
Whole lap, speed
Virtual Safety Car
No car is sent out. Every driver has to slow to a minimum time set by the FIA, so gaps are broadly kept.
-
Whole lap, formation
Safety Car
A real car leads the field. Everyone forms up behind it in a single line, so the gaps between cars can shrink a lot.
-
Stop
Red Flag
Running stops altogether. Cars slow down and go where they are directed, usually the pit lane.
These are not stages that trigger one after another. What race control uses depends on where the incident is, how the car has to be recovered, the state of the track and other conditions.
Single vs double waved yellow
A yellow flag always means there is a hazard, but one waved flag and two waved flags ask for very different things.
Two yellow flags
A more serious hazard: something wholly or partly blocking the track, or marshals working on or beside it.
- Reduce speed significantly
- No overtaking in that sector
- Be prepared to change direction or stop
The green flag is what tells drivers the yellow zone is behind them: the hazard is cleared and that part of the track is back to normal racing.
VSC vs Safety Car
Both neutralise the whole lap and both ban overtaking. The difference that matters for the race is what happens to the gaps between cars.
Virtual Safety Car
- No Safety Car is sent onto the track
- Drivers slow to a minimum time set by the FIA
- Gaps between cars are broadly kept
- Overtaking is prohibited
Safety Car
- The Safety Car goes out and leads the field
- Cars catch up and line up behind it
- Gaps built up over many laps can shrink a lot
- Overtaking is prohibited
The one line to remember: under the VSC the gaps are broadly kept, while behind the Safety Car the field bunches into a single line and the gaps built up earlier can largely disappear.
Why teams pit under a Safety Car or VSC
A pit stop always costs time. What changes under a Safety Car or VSC is how much of that time you lose to your rivals.
Rivals keep circulating at full racing speed while you drive through the pit lane and stop. The time you lose is measured against cars going flat out.
The rest of the field is also running at a reduced speed, so the time lost relative to them can be smaller than in normal racing conditions.
It is not a free stop, though. A Safety Car does not automatically make pitting the right call.
- How much life is left in the current tyres
- Track position: what you give up by stopping
- Whether the pit lane can actually be reached in time
- The plan for the rest of the race
- When the Safety Car or VSC happened
Red flag: is the race over?
No. A red flag means the session has been suspended, not finished. If the situation can be dealt with, the session can be resumed following the regulations and the prescribed procedure.
- Hazard Conditions make it unsafe to keep running
- Red flag The session is suspended
- Cars move Drivers slow down and go where they are directed, usually the pit lane
- Track cleared Cars, debris or conditions are dealt with
- Decision Whether and how the session resumes is decided under the regulations
The exact restart procedure varies with the situation, and if conditions never allow a restart the session may not be resumed at all. This guide stops at the concept rather than covering every restart rule.
Blue flag: who is it for?
A blue flag is not just a request to move aside. It is shown to the slower car to tell it that a faster car has caught up.
Faster car
Catches the car ahead
Car about to be lapped
Is shown the blue flag
Let it past
At the first available opportunity
Blue flags also appear in practice and qualifying, where they warn a driver that a car on a faster lap is approaching, and at the pit exit for cars rejoining the track. Repeatedly ignoring them in the race is reported to the stewards.
Black & white flag vs black flag
They look related but they are a world apart. Both are shown together with a car number.
Black & white flag
A warning about the driver behaviour or driving standards. The driver stays in the race.
Black flag
The driver shown with the car number is disqualified and has to return to the pits immediately.
So a black & white flag is not a disqualification. How penalties themselves work is a separate topic and is not covered here.
Watching a race: the short version
- Yellow There is a hazard up ahead.
- VSC Everyone is being slowed down.
- Safety Car The field is about to bunch up.
- Red Running has been stopped.
- Blue A faster car has caught this one.
- Chequered The session is over.
Frequently asked questions
Can you overtake under a yellow flag in F1?
No. Overtaking is not allowed in a yellow flag sector. Under a single waved yellow drivers must reduce speed and be ready to change direction. Under double waved yellow they must slow significantly and be prepared to change direction or stop.
What is the difference between the VSC and the Safety Car?
Under the Virtual Safety Car no physical car is deployed. Every driver has to stay above a minimum time set by the FIA, so the gaps between cars are broadly kept. With a real Safety Car the field forms up in a single line behind it, so existing gaps can shrink dramatically. Overtaking is prohibited in both cases.
Why do F1 teams pit under the Safety Car?
Because the rest of the field is also running at a reduced speed, the time lost relative to rivals can be smaller than during normal racing. It is not automatically a gain though: tyre condition, track position, whether the pit lane can be reached and when the incident happens all change the answer.
Does a red flag mean the F1 race is over?
No. A red flag means the session has been suspended. Drivers slow down and go to the place they are directed to, usually the pit lane. Once the track is dealt with the session can be resumed following the regulations, although it is not restarted if conditions do not allow it.
What happens if a driver ignores blue flags?
In the race a driver who is caught by a faster car has to let it past at the first available opportunity. Repeatedly failing to do so is reported to the stewards and can result in a penalty.
Related terms
Terms that come up whenever a race is being controlled.
Source & basis
Flag meanings follow Appendix H of the FIA International Sporting Code; the Safety Car, Virtual Safety Car and suspension procedures follow the FIA Formula One Regulations (Sporting). Summarised for readers rather than quoted, and detailed procedures are deliberately left out. Always treat the published regulations as the authority.