RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2016, Vol. 25 >> Issue (05): 702-707.doi: 10.11870/cjlyzyyhj201605002

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RESEARCH ON ACCESSIBILITY PATTERN OF THE ROAD NETWORK IN CHONGQING

CHEN Chun1,2, WANG Bing-de1, SHEN Hao-jing2   

  1. 1. School of Architecture and Urban Planning, Chongqing Jiaotong University, Chongqing 400074, China;
    2. The Centre of Real Estate Research and Appraisals, Peking University, Beijing 100871, China
  • Received:2015-09-06 Revised:2015-12-07 Online:2016-05-20
  • Supported by:
    National Natural Science Foundation of China (41201178);Key Project of National "Twelfth Five-Year" Plan for Science & Technology Support Program (2012BAJ22B00);Basic and Advanced Research Project in Chongqing (cstc2014jcyjA0808)

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Abstract: The road networks of 38 counties in Chongqing were chosen as the research object in this paper. Under the principle of the shortest distance and on the basis of the road network topology structure, the weighted average travel time index and the accessibility coefficient were calculated to measure the accessibility level and its spatial pattern of the road networks in Chongqing. The conclusions are as follows:(1) The accessibility of the 38 counties shows the characteristics of the radial concentric circles with the main urban area as the center of the circle. With the increase of the radius from the concentric circle, accessibility level gradually reduces and forms obvious annular differentiation situation. The main districts and the near districts and counties around maintain high accessibility level and the accessibility level gradually reduces with the increase of distance, while the remote districts and counties have low accessibility and inconvenient transportation.(2) The level of road network topological connectivity is low, which leads to the system of the level of road network not perfect enough and low efficiency of the network radiation. The transportation axis with high connectivity are scarce and the dense parts are mainly distributed in the main districts, which contributes to relatively weak network structure and low effectiveness of the network. The overall network is low and "blind spots" exist in the network the high grade road, which weakens the efficiency and level of the existing network. The road network is expected to extend and expand. (3) The network of the high grade road is in disequilibrium, which leads to sharp differences in the accessibility among different districts and counties affecting the regional coordinated development. High grade road especially highway has significant impacts on regional accessibility. The expressway ring built up in the main districts extends outward presenting a radiation structure. The core city circle has high accessibility, but the radiation area is limited.

Key words: road network, accessibility, Chongqing

CLC Number: 

  • K902
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