SCIENTIA GEOGRAPHICA SINICA ›› 2013, Vol. 33 ›› Issue (5): 513-520.doi: 10.13249/j.cnki.sgs.2013.05.513

• Orginal Article •     Next Articles

Road Network Accessibility and Its Influence on City Potential in Zhujiang River Delta

Zhi-xiong MEI1,2(), Song-jun XU2, Jun OUYANG2   

  1. 1. School of Geography and Planning, Sun Yat-Sen University, Guangzhou, Guangdong 510275, China
    2. School of Geography, South China Normal University, Guangzhou, Guangdong 510631, China
  • Received:2012-09-24 Revised:2013-03-15 Online:2013-05-20 Published:2013-05-20

Abstract:

Based on the road network data of 1990 and 2009 in the Zhujiang River Delta (ZJRD), this article explores the spatio-temporal evolution of the road network accessibility and quantitatively analyzes its influences on urban potential change of ZJRD region with the support of space syntax model, GIS technology and statistical analysis method. The basic conclusions are obtained as follows: 1) The grade-layer difference of the topological connection of the road network has decreased, and the whole accessibility of the road network have been improved significantly from 1990 to 2009. However, the road network development gap between inner and out the core region of ZJRD has been enlarged. 2) The road network accessibility shows an obvious core-periphery structure as a whole, and the core area has been gradually expanded. In 2009, the road network accessibility of Guangzhou-Foshan metropolitan region and Shenzhen-Dongguan-Huizhou metropolitan region was the highest, gradually decreasing from those two regions to the surroundings, which results in the “∧-shaped” form of high integration axes and spatial pattern of the entire road axes stretching radially. There are obvious differences of the spatial distribution change of different grade road axes, and the imbalance of the topological connection of the road network is more significant. The road accessibility in the middle zone is the highest and has been improved quickly, and the east zone ranks the second highest and the disparity between the eastern zone and the middle zone has decreased. Whereas, the road accessibility in the western zone is the lowest, and the disparity between the western zone and the middle and eastern zones has been on a trend of expanding. 3) The spatial intelligibility of the layout of the road network as a whole has improved significantly, but most roads out the core region have still low spatial intelligibility and poor convenience. 4) There is a positive correlation between the road accessibility and city potential of ZJRD region, and the correlative degree has strengthened, indicating that the influence of road traffic on urban potential change is more significant. But it still remained a moderate correlation in 2009.

Key words: space syntax, road network, accessibility, urban potential, Zhujiang River Delta

CLC Number: 

  • F512.99