That duty applies in a Formula 1 Sprint or Race when any car is about to put another car a lap down—not only when the race leader catches the last-placed car. A waved blue flag or blue light panel reinforces the instruction; it is not permission for every generally faster car to demand a place.
Quick ruling: under FIA International Sporting Code Appendix L, Chapter IV, Article 2(a), and the 2026 F1 Driving Standards Guidelines v01, the caught driver must facilitate the pass promptly. The F1 guideline allows some tolerance for the pass to happen on the next straight, but failure to allow it there will likely be treated as a breach.
This page uses the FIA Formula One World Championship rules current on 26 August 2026.
Appendix L, Chapter IV, Article 2(a) attaches the duty as soon as a car is caught by a car that is about to lap it. The lapping car can be running first, third or anywhere else; the decisive fact is the lap difference the pass will create.
Appendix H, Article 2.5.5(e), says the driver shown the race blue flag must allow the following car to pass at the earliest opportunity. The F1 guideline expresses the same test as the earliest possible opportunity and normally expects the pass on the next straight.
Appendix L says an apparent failure to respect blue flags is reported to the stewards. There is no current “three blue flags equals an automatic penalty” rule. Evidence and the opportunity actually available still matter.
The baseline comes from the FIA International Sporting Code, Appendix H 2026 (flag meanings) and Appendix L 2026 (driving conduct). Formula 1 adds its own operation and enforcement through the 2026 FIA Formula 1 Regulations, Section B [Sporting], Issue 08, dated 5 August 2026, plus the 2026 F1 Driving Standards Guidelines v01, dated 26 February 2026.
Section B Article B1.8.4 makes FIA signals official instructions in F1 and gives a trackside light panel the same meaning as the corresponding flag. The F1 guidelines explain how stewards are likely to apply the rule; they are guidance, while the Sporting Regulations and International Sporting Code remain controlling.
The text does not order the lapped driver to brake at once, stop, leave the track or always move off the racing line. It requires the driver to make the pass possible at the first realistic opportunity. In practice that means being predictable, not defending, and leaving a usable route for the lapping car.
The 2026 guideline permits some tolerance so the overtake can occur on the next straight section. That is a practical safety allowance, not a free lap of delay. Article B1.8.5 also prohibits unnecessarily slow, erratic or potentially dangerous driving, so a sudden lift or swerve that creates a hazard is not the answer.
Section K of the 2026 F1 Driving Standards Guidelines says that failing to allow the pass on the next straight will likely be a breach. It says two situations will almost certainly be treated as breaches:
Those are investigation guidelines, not a rule that the first seven panels may safely be ignored. Equally, the number of displays does not alone prove guilt when the caught driver has made a genuine opportunity available and the following driver has not taken it.
At the 2026 Canadian Grand Prix, FIA stewards considered Car 11 after six sets of blue flags before the lapping car passed. They reviewed marshalling data, video, timing, telemetry and in-car video, then took no further action because the driver had provided room and reduced speed and the following car did not complete the pass.
That decision does not create a six-flag allowance. It shows the real test: did the caught driver take reasonable action to allow the pass at the available opportunity? The answer depends on the track position, the drivers' actions and whether an overtaking route was genuinely offered.
During practice, Appendix H says a blue flag means a faster car is close behind and about to overtake. Formula 1's lap-time classified sessions include free practice, Sprint Qualifying and Qualifying. A blue signal in one of those sessions is therefore not evidence that the car ahead is about to lose a race lap.
Separately, 2026 Sporting Regulation B4.1.1 allows the stewards to penalise a driver who unnecessarily impedes another driver in any lap-time classified session. Under B1.9.4, the available F1 outcomes include deleting lap times or dropping grid positions. A traffic incident can therefore be judged as impeding even though the race-lapping rule is not in play.
Appendix H gives the stationary blue flag a third meaning: traffic is approaching on track as a driver leaves the pits. F1 Sporting Regulation B1.6.3(e) requires a blue flag and/or flashing blue light in the Pit Exit Road for that warning.
The green and red pit-exit lights still decide whether a car may leave. A blue warning neither overrides a red light nor grants the exiting car priority over traffic already on track. The driver must merge without turning the warning into an unsafe rejoin.
For a Sprint or Race, the FIA's 2026 F1 Penalty Guidelines list a five-second or ten-second penalty, or a drive-through, for failing to respect blue flags or lights. The table assigns zero penalty points as the norm for this offence. These are guideline outcomes, not a mandatory tariff: Sporting Regulation B1.9 leaves the decision and the response to the stewards, who assess the incident's particular facts.
In a free-practice or qualifying traffic case, the analysis ordinarily turns to unnecessary impeding under B4.1.1 and the lap-time or grid-position powers in B1.9.4. The session matters; a race time penalty should not be presented as the universal result of every blue signal.
It is separate from blue-flag yielding. Under 2026 Sporting Regulation B5.13.4, if the Race Director considers it safe, the message “LAPPED CARS MAY NOW OVERTAKE” is sent and the Safety Car's green light is illuminated. Eligible lapped cars are then required to pass the lead-lap cars and the Safety Car; the lead-lap cars must stay on the racing line unless deviation is unavoidable.
Eligibility uses the timing snapshot in B5.13.4(c): the car must have been lapped when it crossed the Line at the end of the lap on which it crossed the first safety-car line for the second time after deployment. If conditions are unsuitable, Race Control can instead send “OVERTAKING WILL NOT BE PERMITTED.” The field does not choose to unlap itself without the instruction.
Checked on 26 August 2026 against the FIA Formula One Sporting Regulations Issue 08 and the then-current 2026 ISC appendices and F1 guidelines. The F1 guidelines describe likely enforcement but do not displace the controlling regulations. Event-specific Race Director instructions may supplement the baseline, and this page does not extend Formula 1's benchmarks to other racing series.