Abstract: Intersection-group is the basic unit of traffic coordinated control in the urban road network and its scopeis directly related with the coordination and control benefits of the road network. Firstly, based on the improved Whitson model of link re levance, them odel o f path relevance of adjacent intersections is put forward, which takes the space distribution of origin-destination (OD) flow in the local traffic network into consideration. Secondly, hierarchical clustering method is applied to intersection??group dynamic division based on calculated results from the model of path relevance. Finally, an example is given out to verify the mentioned two methods and two division schemes are comparatively analyzed. The research results demonstrate that dynamic division of intersection-group based on the path relevance could reduce the division times for main OD path, and thus could decrease the total numbers of vehicle stops and stop delay in the local road network.

Key words: intersection-group, dynamic division, path relevance, link relevance, main OD path

摘要： 交叉口群是路网交通流协调控制的基本单元,其动态范围划分与路网协调控制效益直接相关。在对经典 Whitson路段关联性模型进行改进的基础上,考虑局部路网上交通流OD的空间分布特征建立了相邻交叉口之间的 路径关联性模型;基于路径关联性模型计算结果,应用层次聚类方法对信号控制交叉口群进行动态划分。最后对 路段关联性和路径关联性的交叉口群动态划分方法进行了算例验证和对比分析。研究结果表明,考虑路径关联性 动态划分交叉口群可以减少对局部路网中主要OD路径的分割,从而降低主干道交通流的总停车次数和停车延误。

关键词: 交叉口群, 动态划分, 路径关联性, 路段关联性, 主要OD路径