关键词: 交通工程, 动态子区划分, 可达性, 路网

Abstract: In order to improve the efficiency of subarea and ensure the reasonableness of the subarea results, a subarea partition method based on road network reachability is proposed. First, the weighted road network is described by nodes（intersections）, links（edges）, and the weight of each edges（amended impedance）, and it is converted into a non-weighted network with the weights switching method. Then the [K] step reachability matrix is proposed to analyze network reachability, choose the best reachability node as the core node, while the [K] step node cluster of the core node is the subarea result. After that, it uses the occupancy variances of links in subzone to optimize the results. A simulation of Beijing Yizhuang Lincoln Park area network results show that the subarea method based on road network reachability can find most closely associated node cluster and select the variance of internal links in the sub-region as an evaluation index can guarantee the sub-region achieve a similarity state, thus provide guidance for the optimize of the subarea.

Key words: traffic engineering, dynamic subarea partition, reachability, road network