Every briefing at every circuit covers the same ground first, and it is not braking technique. It is karting flags meaning: which colour asks you to slow, which one asks you to move over and which one ends your session. A driver who does not know them is a hazard to everyone behind.

Here is the full set, in the order they are likely to affect you, with the mistakes that cause the most trouble.

Karting flags meaning: the quick reference

• Green: the circuit is clear. On a rolling start it means the session has begun; during a session it confirms the track is open after a caution.
• Yellow, stationary: danger ahead, slow down and do not overtake. The hazard is beside the track rather than on it.
• Yellow, waved: danger on the track. Slow significantly, be ready to change line, and no overtaking anywhere in the sector.
• Double yellow: the track is almost blocked. Slow to a crawl and be prepared to stop.
• Red: the session is stopped. Slow down immediately and return to the pit area, without overtaking.
• Blue: a faster driver is about to lap you. Hold your line and let them past, without changing direction suddenly.
• Black: you have been pulled in. Finish the lap and come into the pits, where a marshal will explain why.
• Black with an orange disc: your kart has a mechanical problem. Come in, again without rushing.
• White: a slow-moving vehicle or a recovery is on track. Reduce speed.
• Chequered: the session is over. Complete the lap at a reduced pace and return to the pit lane.

Circuits vary the details, and the briefing at the venue is always the version that counts. The list above is the standard set, and it has been the standard for long enough that a driver who knows it will recognise the pattern anywhere.

Yellow flags: the one that matters most

Yellow is the flag that separates a tidy session from a messy one, because it is the one drivers ignore.

A yellow means two things at once: there is a hazard, and overtaking is banned in that sector. The second part is what people forget. A driver who passes under a yellow has gained a place they will lose again, and at most circuits they will lose it with a penalty attached.

The practical habit is simple. The moment you see yellow, lift. Not brake hard, not swerve: lift, look ahead, and work out where the hazard is before you arrive at it. A kart that has spun is usually stationary in the middle of the corner the marshal is standing beside.

Blue flags and lapped traffic

Blue is the flag that confuses beginners, because it looks like a warning and is actually a courtesy.

A blue flag tells a slower driver that a faster one is coming through. The instruction is to hold your line, not to dive out of the way. Moving suddenly to let someone past is how two karts end up in the same place at the same time, and the driver who moved gets the blame.

The habit: check your mirrors only where the track is straight, hold your line through corners, and let the faster kart choose the side.

Black flags: how a driver gets pulled in

A black flag is not a penalty in itself. It is an instruction to come in, and the reason is explained when you get there. The usual causes are contact with another kart, driving that a marshal judged dangerous, or a mechanical problem noticed from the bank.

Two things to do and one not to do. Do complete the lap and enter the pits at a sensible pace. Do stop where the marshal directs you. Do not sprint for the pit entry as though the session is still running, because the pit lane is where people are standing.

A black with an orange disc is the mechanical version and is not a criticism. Something on the kart has come loose, a wheel is rubbing, a body panel is dragging. Come in, let it be fixed, go back out.

Red flags and stopped sessions

A red flag stops everything. It goes out when the track is blocked, when a kart has to be recovered, or when conditions have changed enough that continuing is unsafe.

The response is the same at every circuit: slow down immediately, no overtaking, and follow the marshal’s direction back to the pit area. Drivers who keep racing to the line under a red flag are the reason sessions get cancelled rather than paused.

Lights, boards and hand signals

Not every instruction arrives on a pole. Many circuits start a session with lights rather than a flag, and the sequence is the same everywhere: red, then a pause, then green. The pause is deliberate, so nobody jumps the start.

Marshals also use hand signals. A raised hand usually means slow down or stop. A pointing arm means go that way. A waved arm at the pit entry means come in. None of these are ambiguous when you are looking at them, which is why the briefing asks you to look at the marshal rather than only at the track.

What the flags do not cover

The flags do not tell you how to drive. They tell you what is happening. A session with no flags at all is a session where nothing went wrong, and that is the normal state of a well-run group.

What the flags cannot fix is a driver who is looking two metres in front of the kart. The habit that makes flags useful is the habit of looking ahead: at the next corner, at the marshal’s post, at the exit of the turn you are approaching. A driver scanning that far ahead sees the yellow before it matters rather than after.

Frequently asked questions

What does a yellow flag mean in karting?

Slow down and do not overtake. A stationary yellow means a hazard beside the track, a waved yellow means a hazard on it. Either way, no passing until you are past the incident.

What does a blue flag mean?

A faster driver is about to lap you. Hold your line and let them through rather than moving aside, because a sudden change of line is what causes contact.

What happens if you get a black flag?

You are called into the pits, where a marshal explains the reason. It is an instruction to stop, not a disqualification in itself.

What does the chequered flag mean?

The session is over. Slow down and return to the pit lane, and do not keep racing to the line.

Are the flags the same at every circuit?

The standard set is the same, but circuits vary the details. The briefing at the venue is the version that counts, and it is worth listening to even if you have driven before.

Where to go next

If this is your first session, read the beginner guide and the guide to what to wear. Then pick a circuit on the tracks page — the Sector 17/18 Link Road loop is the easiest place to learn. For a group session, see the Sector 59 guide or the contact page. For directions, open F9 Go Karting on Google Maps.