城市快速路出入口交织流率和交织长度的仿真研究  

Simulation for the Weaving Ratios and Lengths of Weaving Sections of Exits and Entrances of Urban Expressways

作　　者：周锐[1] 梁肖[1] 毛保华[2] 孙海瑞[1] 

机构地区：[1]北京交通大学城市交通复杂系统理论与技术教育部重点实验室,北京100044 [2]北京交通大学中国综合交通研究中心,北京100044

出　　处：《交通信息与安全》2012年第1期29-33,51,共6页Journal of Transport Information and Safety

基　　金：国家自然科学基金项目(批准号:70631001)资助

摘　　要：城市快速路出入口是引发相关路段及其周围路网拥堵的主要原因。交织流率和交织长度是影响出入口处交通运行的重要因素,并采用仿真方法对两者进行了分析,具体案例的Vissim仿真结果表明:通过总流量为4 900veh/h,流率比由0.15增加到0.4时,交织段均车延误增加2倍,交织车速降低将近40%;交织长度选取160～180m时,均车延误为1.3s,平均车速达到45.02km/h,是快速路出入口交织长度的合理值。The accesses（entrances or exits） of urban expressways are the primary causes for the congestion on related road sections and peripheral roadways.It is found out that the following two factors are important in this regard： the weaving ratio and the length of weaving section.The results from the specific simulation studies through Vissim show that,when the total flow is 4900 veh/h and the weaving ratio increases from 0.15 to 0.4,average delay per vehicle is doubled over the weaving sections,while the interweaving vehicle speed reduces nearly 40%;when the lengths of the weaving sections are selected in the range of 160～180m,every vehicle delay is only 1.3s and the average vehicle speed is about 45km/h.These values are found to be the reasonable values for designing the length of the weaving sections at the exits and entrances of urban expressways.

关 键 词：城市快速路 交通仿真 交织流率 交织长度 VISSIM 

分 类 号：U491[交通运输工程—交通运输规划与管理]