Abstract
Abstract. Space syntax and distance measurement are significant theoretical methods for studying road accessibility. Space syntax deals with the topological relationship between road networks, but the length of the road is ignored. While distance measurement method only takes into account the factors such as distance, time, and economic costs when studying road accessibility. Both of them are defective in evaluating the accessibility of transportation networks, and there are a few of researches that consider the interaction between road axes lines. In this paper a method for traffic network accessibility evaluation is proposed by combining the space syntax theory and the distance measurement method, and considering the influence of the interaction between road axes lines at the same time. The method is successfully applied for evaluating the traffic network accessibility of Nanning in Guangxi. The research shows that: (1) the results of the analysis are compared horizontally with traffic conditions at different times in Nanning City, and the experimental results are nearly in line with the actual road conditions. (2) The areas with high road density are Liangfeng District, Qingxiu District and Xixiangtang District. (3) Nanning City's road network center is located at the intersection of Xixiangtang District, Xingning District, Qingxiu District and Jiangnan District; its traffic network distribution is the densest and the overall level of urban road accessibility is higher. This study provides a theoretical basis for the development of Nanning's transportation network and has the reference significance for further optimizing the transportation planning in Nanning.
Highlights
The theory of spatial syntactic was first put forward by Hanson and Hillier, who believed that the spatial layout of cities would have an impact on the way people travel (Liao, 2013)
(3) Nanning City's road network center is located at the intersection of Xixiangtang District, Xingning District, Qingxiu District and Jiangnan District; its traffic network distribution is the densest and the overall level of urban road accessibility is higher
In studying spatial syntactic theory, the researchers less consider the effects of the interaction between the road axis, and ignore the high-grade road axis which can lead to the improvement of the accessibility of other types of road axis connected with it; Some researchers use distance measurement to take into account the influence factors in the study of accessibility, but ignore the width and speed of roads which can directly have an important impact on road accessibility (Liang et al, 2016)
Summary
The theory of spatial syntactic was first put forward by Hanson and Hillier, who believed that the spatial layout of cities would have an impact on the way people travel (Liao, 2013). This paper mainly solves the above problems through the analysis of the road traffic network in the research area with adding the influence factor of the interaction between the road axes to the spatial syntactic theory in order to achieve the purpose of adding distance measurement analysis. On this basis, some important analysis results are obtained by combining spatial syntactic theory with distance measurement and analyzing the topological connection characteristics of traffic networks (Zheng et al, 2008). This paper is of great significance to the planning and construction of the city, providing an optimal and cost-effective auxiliary design method with high predictability, which will play an important role in urban planning
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