Transportation status of Chinese expressway network in 2009

Based on the database of expressway network toll system and the typical sampling investigation data at toll stations, the transportation status of Chinese expressway network was analyzed. Compared with the transportation status in 2008, in 2009, passenger transportation density in expressway network rises by 7.96%, and 43.30% of passenger turnover volume is produced by mini-type buses (the seat amount of every bus is less than 8), which rises by 2. 29%. The average speeds of Ⅰ-type (the seat amount of every bus is less than 8) and Ⅳ-type buses (the seat amount of every bus is more than 40) decrease slightly, but the average speeds of Ⅱ-type and Ⅲ-type buses (the seat amount of every bus is between 8 and 40) rise slightly. Freight transportation density rises by 4.58%, and 76.14% of freight turnover volume is produced by tractor-trailer vehicles. The percentage of empty to loaded truck kilometers of trucks is 19. 84%, which decreases slightly. The percentage of trucks with overweight more than 30% is 4.62%. In 2009, the transportation of Chinese expressway network keeps high-speed growth, but the rate of traffic accidents on expressways declines steady, and decreases by 13.40%.