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Most races of the Automobile World Championship in the early 1950s took place on closed public roads. Permanent racetracks like the Nürburgring or the Autodromo Nazionale Monza were still the exception. With ever-increasing speeds, the number of fatal accidents increased. Accordingly, a rethinking began, the change to permanent racetracks with safety devices such. As run-off zones, safety fences and closed spectator areas initiated.
Today, all Formula 1 circuits must meet the highest safety requirements of the FIA and are approved by FIA Commissioners. The track surface must consist of asphalt. The courses should not be longer than 7 km. The minimum length of a Formula 1 race track is 3.5 km. The only exception in the current Grand Prix calendar is the Circuit de Monaco with 3.340 km.
The minimum width of each newly approved route is 12 m, on the start straight to the end of the first corner even 15 m. The longitudinal gradient is regulated in relation to the speed. The start straight should not have more than 2% gradient and the gradient across the direction of travel should be 1.5 to 3% for the drainage. The elevation of curves must not exceed 10%. Each launch site must have a length of 8 m.
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