A red flag is shown when there has been a crash or the track conditions are poor enough to warrant the race being stopped. The flags are displayed by the marshals at various points around the circuit.[5] A Global Positioning System (GPS) marshalling system was introduced in 2007. It involves a display of flag signals in the driver's cockpit, which alerts them to the crash.[6] Following a red flag being shown, the exit of the pit lane is closed and cars must proceed to the pit lane slowly without overtaking, lining up at the pit exit.[7] From 2005, a ten-minute warning is given before the race is resumed behind the safety car, which leads the field for a lap before it returns to the pit lane.[8] Previously, the race was restarted in race order from the penultimate lap before the red flag was shown.[9] If a race is unable to be resumed, "the results will be taken at the end of the penultimate lap before the lap during which the signal to suspend the race was given".[7] If 75% of the race distance has not been completed and the race cannot be resumed, half points are awarded. Until 2015, no points were supposed to be awarded if the race could not be restarted and less than two laps had been completed,[10][11] but starting in 2016 this rule was updated to "no points if two laps or less have been completed".[12]
None, although Clay Regazzoni and Jacques Laffite illegally used their spare cars at the restart, and were subsequently disqualified. James Hunt would be disqualified two months later.
Crash involving Elio de Angelis, Roberto Guerrero, and Riccardo Patrese. The race was decided by combining the time from the first 6 laps with the time from the restarted 64, shortened to 56 due to the two-hour time limit.
Crash of Gerhard Berger. The race was shortened from 61 to 58 laps, and was decided by combining the time from the first 3 laps with the time from the restarted 55.
Fatal crash of Ayrton Senna. The race was shortened from 61 to 58 laps, and was decided by combining the time from the first 5 laps with the time from the restarted 53.
Rain and a crash involving Martin Brundle, resulting in an injured marshal. The race was restarted with race leader Michael Schumacher behind the safety car and was decided by combining the time from the first 13 laps with the time of the restarted 37.
^When Jos Verstappen stalled his car on the grid, Race Director Charlie Whiting attempted to abort the start, a procedure that is carried out when a car is stalled before the lights go out. However, the lights went out before he had the chance to do so, and as a result the lights afterwards displayed the standard 5 red lights and 3 amber lights. The race was immediately stopped, but the red flag was not displayed until the cars came to the start/finish line. As is the case when a start is aborted, the race was shortened by one lap as the cars were not refuelled, but Verstappen was allowed to regain his original grid position in 15th.[71]
^From the 2000 season, races stopped after two laps but before three-quarters race distance had been completed would be restarted with the cars lining up on the grid in the order they were at the end of the penultimate lap before the lap during which the red flag was shown. Only the race order and number of laps completed were taken into account for the new race, time differences between the cars were voided. The distance of the new race was the number of laps remaining from the original races, minus three laps, with the lap counter also reset to lap one.[77][78]
^Kimi Räikkönen was originally awarded the race win, but after an error in the declared results was discovered several days later by race officials, the win was reallocated to Giancarlo Fisichella.[80]
^This was the first Grand Prix to be resumed despite 75% of the race distance having been completed, due to a 2005 regulation change that saw the terms "stopping" and "restarting" a race replaced with "suspending" and "resuming". Under the new regulations, regardless of distance completed, all races would be resumed behind the safety car with the cars in the order they were at the time of the red flag, once it was safe to do so. Only in the event that it was not possible to resume the race (including the four-hour rule) would a result be declared from the penultimate lap before the lap during which the red flag was shown.[85]
^ abcdefghijklmnopThe race was resumed under the safety car, which led the field for one official lap, before racing resumed with a standing start.
^The race was resumed under the safety car, which led the field for one official lap, before racing finished with a rolling start to the finish line.
^"About FIA". Fédération Internationale de l'Automobile (FIA). 24 February 2015. Archived from the original on 13 November 2015. Retrieved 24 November 2015.
^"2020 Formula One Sporting Regulations"(PDF). Fédération Internationale de l'Automobile (FIA). 7 April 2020. pp. 3–4. Archived(PDF) from the original on 12 April 2020. Retrieved 15 April 2020.
^"Flags". Formula 1. Archived from the original on 24 November 2015. Retrieved 24 November 2015.
^"Brazilian GP as it happened". BBC Sport. British Broadcasting Corporation. 6 April 2003. Archived from the original on 6 April 2003. Retrieved 8 September 2012.
^Benson, Andrew (22 July 2007). "Alonso win cuts Hamilton's lead". BBC Sport. British Broadcasting Corporation. Archived from the original on 25 September 2007. Retrieved 8 September 2012.
^Whyatt, Chris (5 April 2009). "Classy Button wins abandoned race". BBC Sport. British Broadcasting Corporation. Archived from the original on 7 April 2009. Retrieved 8 September 2012.
^McCourt, Ian (26 May 2013). "F1: Monaco Grand Prix – live!". The Guardian. Guardian News and Media Limited. Archived from the original on 6 September 2013. Retrieved 26 May 2013.
^Barretto, Lawrence (6 July 2014). "British Grand Prix Live". BBC Sport. British Broadcasting Corporation. Archived from the original on 6 July 2014. Retrieved 6 July 2014.
^Barretto, Lawrence (5 October 2014). "Japanese Grand Prix Live". BBC Sport. British Broadcasting Corporation. Archived from the original on 5 October 2014. Retrieved 5 October 2014.
^Rose, Gary (20 March 2016). "Australian Grand Prix". BBC Sport. British Broadcasting Corporation. Archived from the original on 27 March 2016. Retrieved 20 March 2016.
^Strickland, Jamie (13 November 2016). "Brazilian Grand Prix". BBC Sport. British Broadcasting Corporation. Archived from the original on 13 November 2016. Retrieved 13 November 2016.
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