transportation routes of the provinces to characterize the
composite index of stock of transport infrastructure. Among
them, the transport line density equals the ratio of the weighted
sum of the length of the three transport routes to the regional
area which they are located in, while the weight of various
transport facilities length is equal to the proportion of its annual
freight to the annual total freight. According to the "China
Statistical Yearbook", this paper calculates the physical stock
of transport infrastructure in China's 31 provinces in 2002 and
2006, and looks it as a composite index to reflect the level of
transport infrastructure. Thus China's 31 provincial
transportation network densities in 2002 and 2006 are obtained,
see Figure 1. After comparative analysis, we found that there is
great heterogeneity in level of transport infrastructure in
China's provinces between in 2002 and 2006. Among them, the
corresponding indicators of Beijing, Shanghai, Tianjin, Jiangsu
and Guangdong place in the forefront, where the densities of
transportation routes are much higher than the national average.
While the corresponding indicators of Guizhou, Qinghai, Tibet,
Xinjiang and Inner Mongolia and other western provinces are
far below the national average. Meanwhile, China's
transportation network density in 2006 has a relatively large
increase based on 2002. Among them, the transportation
network density of Henan and Chongqing increased
significantly, and that of Guangdong and Hainan relatively
slightly decreased. But spatial distribution of transportation
infrastructure in China is still of great imbalance, there are still
a large gap between the provinces, fluctuations in 2006
between the province domains are more than in 2002, so the
gap of level of transport infrastructure between province in
China was expanded further.