基于GIS的宁波市道路网络综合通达性研究

城市道路交通网络通达性是城市规划、交通体系建设等所要考虑的重要方面。利用GIS技术,以距离度量模型、道路加权核密度模型、路网连通度和公交服务指数为基础,分别从路网连接结构、路网密度、路网发育程度、公交便捷性几方面建立综合通达性指标,分析宁波市中心城区道路网络通达性及其空间特征。研究表明:宁波市中心城区的综合通达性以江东区和海曙区最优,其次为鄞州区和江北区,北仑区和镇海区通达性较差,整体空间格局分异明显;北仑区在道路结构方面优势明显;公交服务指数对综合通达性的影响最为显著。对以往的城市交通网络通达性研究进行一定的改进,为宁波市道路交通网络的建设与布局优化提供理论依据。

A Study on Comprehensive Accessibility of Road Network in Ningbo City Based on GIS

Urban road traffic network is the important part of urban planning,traffic system construction andect.This paper analyzes the road network accessibility and spatial feature of the central region in Ningbo Cityby with the means of establishing comprehensive accessibility in terms of road network junction structure,density,degree of development and public transportation convenience based on distance measurement model,road weighted kernel density,road network connectivity and public transport service index.The results show that the comprehensive accessiblities of Jiangdong district and Haishu district are at higher level,and then the ranking is Yinzhou district and Jiangbei district,and Beilun district and Zhenhai district have lower level.These regions show obviously differences in spatial pattern.Beilun district has an obvious superiority of road structure.The public transport service index has significant impact on comprehensive accessibility.This paper has improved the previous research on urban traffic network,and provides theory basis for the construction and layout optimization of