城市道路网布局结构对公交线网密度的影响

Impact on Density of Public Transportation Network by Urban Road Network Layout

定义了描述道路网整体结构中心化程度的道路网结构集聚度指标,用于描述路网中道路之间的衔接关系,定义了描述道路网综合布局特性的道路网布局结构指数,结合实例分析了路网布局结构对公交线网密度的影响因素和影响机理,通过对实例数据的回归分析验证了公交线网密度与道路网密度和道路网结构集聚度之间的相关关系,并指出道路网布局结构指数与公交线网密度之间具有显著的线性正相关关系.

This study first defines two new indicators to describe the characteristics of road network structure,one is road network concentration degree,which describes the extent to which the network has a centralized structure,another is structure index of road network layout,which describes comprehensive structure properties from the aspects of road network density and network topology.Then the influencing factors and mechanism which impact on density of public transportation network by road network layout are analyzed.Finally,based on the regression analysis of field data,this study points out that the density of public transportation network is influenced by density of road network and road network concentration degree,there is a significantly positive linear correlation between density of public transportation network and structure index of road network layout.