基于交通安全的城市路网结构优化方法  

Urban Road Network Structure Optimization Method Based on Traffic Safety

作　　者：龙雪琴[1] 关宏志[1] 

机构地区：[1]北京工业大学交通工程北京市重点实验室,北京100124

出　　处：《公路交通科技》2012年第4期107-113,共7页Journal of Highway and Transportation Research and Development

基　　金：北京市自然科学基金项目(8102007)

摘　　要：考虑城市交通事故与道路网结构的关系,结合交通事故导致的时间延误,提出了基于交通安全的城市路网结构优化方法。首先分析了不同等级道路之间的衔接方式对出行者选择路径行为的影响,总结了交通事故的影响因素。然后在此基础上提出了基于交通安全的路网构造原则,建立了以路网安全度最大为目标的路网结构模型,并通过求解模型确定各路段的道路等级,得到安全度和结构不同的若干个路网。通过考虑交通事故时间延误情况下,进行随机均衡分配,得到路网各路段的交通量,并计算各路网的交通事故次数。最后提出了路网的安全性评价指标,分析交通事故次数和路网结构指标的关系,提出了考虑安全性的路网结构优化措施,并用实例验证了优化措施的有效性。Considered the relationship between urban traffic accidents and road network structure, combined with traffic accident delay, an urban road network structure optimization method based on traffic safety was advanced. At first, the influence of joining style of different grade roads on route choosing behaviors of travelers was analyzed, and influencing factors of traffic accidents were summarized. Based on which, road network constructing principles based on traffic safety were advanced, and a road network structure model with the largest safety degree as the goal was established. The road sections＇ grade was determined through solving the model, and several road networks with different safety degrees and structures were got. Then, a random equilibrium distribution method was used to determine all sections＇ traffic volumes considering the traffic accident delay, and the networks＇ accidents were calculated. At last, the network security evaluation indexes were proposed, the relation between accidents and network structure indexes were analyzed, the measures of road network structure optimization considering safety were proposed, and the effectiveness of optimization measures was validated.

关 键 词：交通工程 路网结构优化 随机均衡分配 路网安全度 交通事故延误 

分 类 号：U491.13[交通运输工程—交通运输规划与管理]