Journal of South China University of Technology(Natural Science Edition) ›› 2023, Vol. 51 ›› Issue (2): 111-121.doi: 10.12141/j.issn.1000-565X.220159

Special Issue: 2023年交通运输工程

• Traffic & Transportation Engineering • Previous Articles     Next Articles

Development Law of Traffic Network Density in the Spatial Structure of Metropolitan Area Hierarchy

WU Jiaorong1,2 HUANG Zhengwen1 DENG Yongqi2   

  1. 1.Urban Mobility Institute,Tongji University,Shanghai 201804,China
    2.Key Laboratory of Road and Traffic Engineering of the Ministry of Education,Tongji University,Shanghai 201804,China
  • Received:2022-03-29 Online:2023-02-25 Published:2023-02-01
  • Contact: 吴娇蓉(1973-),女,教授,工学博士,博士生导师,主要从事轨道交通与空间规划研究。 E-mail:wjrshtj@163.com
  • About author:吴娇蓉(1973-),女,教授,工学博士,博士生导师,主要从事轨道交通与空间规划研究。
  • Supported by:
    the National Natural Science Foundation of China(52072263)

Abstract:

During the "14th Five-Year Plan" period, China has entered a new stage of urbanization development. Cultivating modern metropolitan areas is an efficient approach to promote the development of urban agglomerations. Rapid transportation systems such as expressways and high-speed railways in the regional transportation network are the precondition for the formation and development of metropolitan areas. The regional heterogeneous spatiotemporal convergence effects caused by them profoundly affect the spatial pattern of metropolitan areas. Therefore, there is a urgent need to examine the interactive relationship between the spatial organization of metropolitan areas and different transportation network levels. In order to explore the development law of spatial variations on expressway and railway density caused by the dislocation of population aggregation and economic development in metropolitan area hierarchy, this paper constructed a city correlation strength model based on multi-source data. It took five metropolitan areas in the Yangtze River Delta urban agglomeration as examples and districts and counties as spatial units. Multidimensional scaling analysis and spatial distance elements were applied to identify the boundaries of the metropolitan area hierarchy, namely boundaries of core circle, tight circle, and planning range. Based on the five main indicators of population density, per capita GDP, land output rate, railway density, expressway density in each metropolitan area hierarchy, this paper discovered the correlation law between socioeconomic development and transportation network density. Results show that there are unbalanced population agglomeration and economic development in each circle of the metropolitan area, and the development curves of "population density-output per land" and "output per land-output per capita" are "S-shaped" and "logarithmic", respectively; the development laws of "population density-expressway density" and "land output rate-expressway density" both show a "logarithmic" curve, but those of the current railway density curves vary from those of expressway; when the population density is higher than 600 people/km2 and the land output rate is more than 80 million yuan/km2, the railway density in the core circle is insufficient. This study provides a new perspective for the research on integrated transportation network planning in the metropolitan area.

Key words: metropolitan area, spatial structure of hierarchy, expressway density, railway density, development law

CLC Number: