基于城市群尺度的高铁列车与长途汽车网络结构比较

基于城市群尺度，以高铁列车和长途汽车作为2种交通方式代表，结合网络分析方法对比2种方式的联系格局和结构属性等。研究发现：① 高铁列车在城市群之间的运输频次普遍较高，长途汽车的频次主要集中于城市群内部的运输线路；② 各城市群的长途汽车网络已拥有一定规模，网络的成环率、结合度和连接率普遍高于高铁列车网络；③ 2种交通方式在不同城市群的发展差异较大，长三角和珠三角等城市群的2种网络都较为成熟发达，京津冀和成渝等城市群的长途汽车网络连通性明显优于高铁，北部湾等城市群的2种网络都有较大的发展空间；④ 高铁列车网络具有轴线结构特征，长途汽车则呈“核心?边缘”的网络结构，在具体城市群中两种网络结构又具有一定差异性。

A Comparative Study on Network Structures of High-speed Train and Inter-city Coach Based on the Urban Agglomerations

High-speed railway and highway are the important components of land transportation and play an important supporting role in the development and integration of the urban agglomerations. At the urban agglomeration level, this article takes high-speed trains and inter-city coaches as the representatives of the two modes, and compares the characteristics of the two networks with the network analysis method. The results show that: 1) The frequency of high-speed trains is generally higher between urban agglomerations, and the frequency of inter-city coaches is mainly concentrated in the city-pairs in urban agglomerations; 2) The inter-city coach network are more mature and complex in many urban agglomerations and have higher values of the network characteristic indicators than high-speed trains. 3) The development of the two modes of transportation varies greatly in different urban agglomerations. The two networks in the Yangtze River Delta and the Pearl River Delta are relatively mature and developed. The inter-city coach network connectivity in the Beijing-Tianjin-Hebei and Chengdu-Chongqing urban agglomerations is obviously superior to that of the high-speed train network. 4) The high-speed train network is with axis structure, while the inter-city coach network shows the ‘core-periphery’ structure. In the specific urban agglomeration, the two networks’ structures hold differences.