What does parc fermé mean in F1?
The "closed park" rules that lock a car's set-up from the start of qualifying, banning most changes before the race.
Parc fermé is French for "closed park" and refers to the period, beginning when a car leaves the pits for qualifying, during which teams may not change the car's set-up. The idea is to stop teams running a special low-downforce qualifying trim and then rebuilding the car for the race. Only a short list of permitted jobs — tyre changes, minor front-wing adjustments, topping up fluids — is allowed without penalty. Breaking parc fermé, for example to change set-up, usually means starting from the pit lane.
See also: how F1 qualifying works.
Related race procedure & flags terms
- Formation lap — The single lap the field completes behind no one to reach the grid, warming tyres and brakes before the start.
- Safety Car — A road car sent onto the track to lead and slow the field when there is a hazard, bunching the pack.
- Virtual Safety Car (VSC) — An electronic slow-down that holds every car to a set delta time without deploying the physical Safety Car.
- Yellow flag — Warns of a hazard ahead: slow down, no overtaking. Double waved yellows mean a serious hazard and be ready to stop.
- Red flag — Stops the session immediately; cars return to the pits or grid because conditions are unsafe to continue.
- Blue flag — Shown to a driver about to be lapped, telling them to let the faster leading car through.
- Black flag — Shown with a driver's number, it orders that driver to return to the pits — they are disqualified or excluded.
- Black-and-white flag — A sporting-conduct warning shown with a driver's number — effectively a yellow card for unsporting driving.
- Chequered flag — The black-and-white checked flag waved at the finish line to signal the end of the session or race.
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Definition written in plain language from the current F1 sporting rules and common usage, current as of 14 August 2026. Unofficial; not affiliated with Formula 1.