Formula 1
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should give a distance of approximately 305 km (190 mi) (260 km (160 mi) for Monaco). Race officials may end the race early (putting out a red flag) due to unsafe conditions such as rain, and it must finish within two hours, although races are only likely to last this long in the case of extreme weather. Drivers may overtake one another for position over the course of the race and are 'Classified' in the order they finished the race. If a leader comes across a back marker (slower car) who has completed fewer laps, the back marker is shown a blue flag telling him he is obliged to allow the leader to overtake him. The slower car is said to be 'lapped' and, once the leader finishes the race, is classified as finishing the race 'one lap down'. A driver can be lapped numerous times, by any car in front of him. A driver who fails to finish a race,
through mechanical problems, accident, or any other reason is said to have retired from the race and is 'Not Classified' in the results. However, if driver has completed more than 90% of the race distance, he will be classified.
Throughout the race drivers may make pit stops to change tyres and repair damage (until the 2010 season they could also refuel). Different teams and drivers employ different pit stop strategies in order to maximise their car's potential. Two tyre compounds, with different durability and adhesion characteristics, are available to drivers. Over the course of a race, drivers must use both. One compound will have a performance advantage over the other, and choosing when to use which compound is a key tactical decision to make. The softer of the available tyres are marked with a green stripe on the sidewall to help spectators to understand the strategies. Under wet conditions drivers may switch to one of two specialised wet weather tyres with additional grooves (one "intermediate", for mild wet conditions, such as after recent rain, one "full wet", for racing in or immediately after rain). If rain tyres are used, drivers are no longer obliged to use both types of dry tyres. A driver must make at least one stop to use both tyre compounds; up to three stops are typically made, although further stops may be necessary to fix damage or if weather conditions change.
The format of the race has changed little through Formula One's history. The main changes have revolved around what is allowed at pit stops. In the early days of Grand Prix racing, a driver would be allowed to continue a race in his
Michael Schumacher won five consecutive titles with Ferrari