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A circuit , also called a circuit , is a closed race track . In motorsport, circuit races are held on circuits in which the course is repeatedly lapped by two or more automobiles driving on the same route at the same time. In contrast to a circuit, the start and finish of an open racetrack are separate and the route is only driven once.

The length of a race lap can vary widely. Kart tracks are only about one kilometer long, while circuits for touring cars and formula racing are usually between 3.5 and 7 km long. Longer courses like the Nordschleife of the Nürburgring are 20 to 25 kilometers long , depending on the route variant. The longest route on which competitions with an international title were held in the post-war period was the Targa Florio in Sicily with a lap length of over 70 km. The longest route used for sports car races was the Mille Miglia , a triangular course in Italy over around 1,600 kilometers of otherwise public roads that was only driven once per race.


A distinction is made with regard to circular routes


In running, hourly runs are held on circular courses in the ultramarathon . The lap length varies between one and several kilometers, on which either 6-hour , 12-hour or 24-hour runs are completed. There are also competitions of more than 24 hours on longer routes. On the 400-meter track, the direction of running is changed sometimes every hour in competitions lasting 12 hours and up to prevent the athletes from one-sided fatigue. This shape is also not uncommon on fin tracks .

Circular courses are of particular importance for the DLV - and therefore IAAF - approval as a best-list route. The start and finish of an event away from the stadium may not be more than 50% of the route length apart. Together with other criteria, this regulation ensures international comparability of competition courses.

See also

Individual proof

  1. DMSB Handbook 2011 - Automobilsport Kartsport , PDF file, accessed December 6, 2010.