Racecourse Cycling Racecourse

（1） Track bike
The track cycling competition is also known as the "circular track" competition. The competition must be held on a circular field with a surface of wood and a circumference of 250 meters. The track of the racing track is designed in an oval and basin shaped structure. The maximum safe speed range of the runway should be designed between 85km/h and 110km/h. The curve radius and runway width of different runway lengths are shown in the table. At the lower part of the runway, there is a relaxation track (blue zone) that accounts for 10% of the runway width, and a safety area for athletes, coaches, and referees to compete on the track. On sites greater than or equal to 250 meters, the total width of the safety area shall not be less than 4 meters. There is a 5 centimeter wide black line at a distance of 20 centimeters outside the blue zone as the measurement line, and the size of the site is measured by the measurement line. The red line with a width of 5 centimeters at the extension of 70 centimeters on the measuring line is a fast cycling line. 
（2） Mountain Bike
The cycling distance for mountain cycling is 40-50 kilometers. The flat section shall not exceed 15%, while the rest are uneven sections. The route usually consists of high-speed downhill sections, mountain climbing sections, rural sections, gravel sections, forest sections, and short asphalt sections.
Set up a sign every 1 kilometer on the track, indicating the number of kilometers away from the finish line. The size of the road sign is 20 centimeters wide and 40 centimeters long, placed 1.5 meters above the ground. Road signs should accurately indicate the race route and subsequent changes in road conditions, as well as intersections and all potentially dangerous areas.
The starting section must be wide enough for the driver to start safely. The front and back of the finish line should have a long enough straight path and a wide field of view to provide safety assurance for the buffer after the finish sprint and sprint