Transportation analysis of Chinese expressway network in 2007

Based on the databases of expressway toll system and sample survey in toll station, the transportation state of Chinese expressway network in 2007 was analyzed. Analysis result showed that the density of freight traffic in expressway network rose by 12.30% in the same period in 2006. The passenger traffic density of mini-type buses(the seat amount of every bus is less than 8) rose by 18.90%. 66.20% of freight turnover volume was produced by tractor-trailer combinations. The percentage of empty truck kilometers to loaded truck kilometers was 18.97%. The percentage of trucks whose overweight was more than 30% was 6.81%, 38.12% of passenger turnover volume was produced by mini-type buses. Average passengers carried by per car were 2.50. The characteristic of transportation in Chinese expressway network was that the proportion of freight traffic is higher. Vehicle kilometers completed by trucks accounted for 37.52% in total vehicle kilometers. This situation aggravated loads on road, and facilitated accidents, especially on montane expressways. In 2007, passenger transport market formed by large sized and medium-sized passenger cars in expressway network was pressed by railway transportation, and this situation will continue in the next few years.