F1 Red Flag Rules: What Happens When a Race Is Stopped

F1 red flag rules in short: when race control shows a red flag, racing stops, the cars return to the pit lane in single file behind the safety car, and teams may change tyres and make limited repairs before a restart. The grid for the restart follows the order the cars held at the last point where every position could be determined. At Sepang on 4 October 2026, a red flag arrived before the Bahrain Grand Prix in Malaysia had properly begun.

What is a red flag in F1?

A red flag stops the session because the track is, in the words of the sport, unsuitable for racing. PlanetF1 lists the usual causes: heavy rainfall, a crash that needs clearing, barrier repairs, a medical response or loose objects on the circuit. It is the strongest signal race control has, and it overrides everything else.

The practical effect is that the clock keeps running for broadcast and for the schedule, while the race itself pauses. That is why a red flag can feel like both nothing and a catastrophe at once.

What happens to the cars during a red flag?

They stop racing and return to the pit lane, following the safety car in single file. They are then lined up in the order they held when the flag came out. Teams can start work on the cars immediately, within limits.

According to PlanetF1's explainer, teams may fit fresh tyres and wheels, start engines, top up compressed gas, adjust brake and radiator ducts and the front wing, and make cockpit comfort changes. Repairs are allowed too, a point famously used in the 2021 British Grand Prix. What is not allowed is a setup change.

That tyre rule is the competitive heart of the whole thing. A red flag is, among other things, a free pit stop for everyone, so a driver who was about to lose time on a stop can find it handed back.

Can teams change tyres under a red flag?

Yes. Fresh tyres are among the main permitted changes, which is why red flags tend to produce a different race from the one that was running before. For a race stopped before it has started, as at Sepang, the same principle applies to a wet-weather call: there is time to change your mind about the tyres.

We do not know what any team decided at Sepang, and we will not guess. The rule just means they had the option.

How does an F1 red flag restart work?

There is a countdown. According to PlanetF1, five minutes before the restart the wheels must be fitted and tyre blankets disconnected. With two minutes to go, lapped cars and those between the safety car and the leader may complete a lap at reduced speed. At one minute the engines are started, and the pit lane must be cleared by the 15-second mark.

There are two kinds of restart. A standing start is the default in dry conditions: the cars form up on the grid and the full start sequence applies. A rolling start is used when it is wet or visibility is a concern, with the field following the safety car until it pulls in and racing resumes. Standing starts became the preferred method under the 2018 regulations, according to the same explainer.

Why did the rules get tweaked in the past?

Because the restart is where races get messy. In 2023, after a chaotic final restart at the Australian Grand Prix, the FIA adjusted the procedure for Baku: the safety car's lights were turned off immediately after leaving the pit lane, so the lead car set the pace. The reason, according to The Race, was driver feedback about tyre temperatures and grip. The change was made through race director event notes, with talks planned on a permanent update.

That is useful to know for two reasons. It shows the procedure is not frozen, and it shows the sport reacts to the one place it looks worst: the first lap after a long wait.

What does a red flag mean for strategy and the championship?

It scrambles the plan and compresses the day. Everything the strategists had worked out before the stoppage can be replaced by a fresh choice of tyres and a new restart order. For a pole-sitter, as Max Verstappen was at Sepang, the order carries over and the risk is on the restart itself.

None of this changes the points. What it changes is who gets to the finish with a car in one piece and what their tyres look like when they do. It is part of why the Sepang race, with its 93-minute delay according to RacingNews365, was as much about waiting as racing.

The short version

Red flag: everything stops. Pit lane: everyone returns in order. Garage: tyres and repairs, no setup changes. Restart: countdown, then standing or rolling, depending on the weather. The details can be altered by race director notes, so check the official regulations for the weekend.

For a look at how often the sport actually gets close to a stoppage, see the telemetry page for race-control messages, and create a free account to keep your picks, form and leagues in one place.