基于交通仿真的分流式菱形立交桥应用研究  

Application Research on Diverging Diamond Interchanges Based on Traffic Simulation

作　　者：赵曾炎 陈杰 Zhao Zengyan

机构地区：[1]长安大学运输工程学院 [2]不详

出　　处：《交通与港航》2025年第2期74-81,共8页Communication & Shipping

摘　　要：分流式菱形立交是一种从同步分相设计发展而来的互通式立交形式。相比传统的交叉口渠化设计,分流式菱形立交具有冲突点少、相位少、延误时间少等优点,且能够更好地应对大交通量的左转需求。根据分流式菱形立交的适用条件,选取广州市中山大道与科韵路交叉口为例,运用交通仿真的方法开展分流式菱形立交运行评价,并进一步探讨了在非饱和流和过饱和流条件下的运行指标。仿真结果表明,分流式菱形立交较现状传统的交通组织模式,在总延迟、排队长度、停车数等服务水平指标方面分别优化了50.0%、57.5%和44.0%,且在低、中、高和极高四种交通量条件下(实际交通量的50%、100%、150%、200%),均有明显改善。Diverging diamond interchange(DDI)is a form of interchange developed from synchronized split-phase design.Compared with the traditional intersection channelization design,DDI has the advantages of fewer conflict points,fewer phases,less delay,etc.,and it can better cope with the demand of left turn of large flow.This paper selects the intersection of Zhongshan Road and Keyun Road in Guangzhou City as an example according to the applicable conditions of DDI,and uses simulation to evaluate the operation of it,and further discusses the operation indexes in unsaturated and oversaturated flow conditions.The simulation results show that the total delay,queue length,number of stops and other service level indicators of the diverging diamond interchange are optimized by 50.0%,57.5%and 44.0%respectively compared with the status quo traditional traffic organization mode,and there is a significant improvement in the four traffic volume conditions of low,medium,high and very high(50%,100%,150%and 200%of the actual traffic volume).

关 键 词：分流式菱形立交桥 渠化设计 交通仿真 服务水平 

分 类 号：U412.35[交通运输工程—道路与铁道工程]