关键词: 城市交通, 城市复合交通网络, 复杂网络, 城市道路交通网络, 可达性

Abstract:

According to the actual traffic network in Third- Ring Road of Beijing, the complex network model of urban road traffic network is built, urban rail transit network and urban complex traffic network which is formed by the superposition of the former two. Based on the complex network theory, the value and distribution of the network’degree, clustering coefficient, average shortest way length, betweenness and node tightness are computed by Matlab and analyzed． Then, this paper compares the statistical characteristic values of the two network models. The results indicate that they both have the characteristic of low clustering coefficients of random network model and scale- free network model. After the addition of urban rail transit network, network diameter and average path length are reduced, and the average degree, node tightness and clustering coefficient are increased to different extent. The accessibility of the whole network is improved and the capacity of network becomes larger.

Key words: urban traffic, urban complex traffic network, complex network, urban road traffic network, network accessibility