Optimization of lane assignment for signalized T-intersection based on VISSIM  

基于VISSIM的信号控制T型交叉口车道分配方案优选（英文）

作　　者：Cheng Lanxing Qian Zhendong Luo Sida Li Juchen 程蓝星;钱振东;罗斯达;李居宸(东南大学智能运输系统研究中心,南京210096;Department of Civil and Environmental Engineering,Northwestern University;东南大学交通学院,南京210096)

机构地区：[1]Intelligent Transportation System Research Centre,Southeast University,Nanjing 210096,China [3]School of Transportation,Southeast University,Nanjing 210096,China

出　　处：《Journal of Southeast University(English Edition)》2018年第1期112-119,共8页东南大学学报（英文版）

摘　　要：In order to improve the performance of the signalized intersection,an unconventional scheme tandem design(TD)is proposed.A simulation experiment is conducted to evaluate the capacity and delay under the unconventional scheme and two conventional lane assignment schemes.First,the VISSIM is employed as microsimulation to obtain the delay of different designs at signalized T-intersections under different conditions of traffic flow and turning proportion.Secondly,a method based on discriminant analysis(DA)is proposed to determine the best design scheme using the flow and turning proportion as inputs.Finally,a case study in Changsha city,China is used to demonstrate the efficiency and accuracy of these findings.The results indicate that the traffic flow and turning proportion are the crucial factors in scheme selection of lane assignment.Different from the previous research,the TD has better performance over various traffic flow levels.Furthermore,a proper proportion of left turns makes TD an outstanding option,which can reduce the delay and decrease the average number of stops and queue length significantly.However,the proportion should not be too high or too low.The research results can help practitioners obtain a quantitative view of appropriate design schemes at signalized intersections when trying to relieve traffic congestion according to different traffic conditions.为了改善信号控制交叉口的性能,提出了基于串联设计的非传统交叉口车道分配方法,结合仿真模拟实验对串联设计和2种传统设计方案进行通行能力评价和延误评价.首先,采用VISSIM软件进行微观仿真,得到不同交通流量和转弯比例条件下3种车道分配设计方案的延误数据.其次,以交通流量和转弯比例作为自变量,提出了基于判别分析来确定最佳车道分配设计方案的方法.最后,采用长沙市的实测数据对研究结果进行了验证.研究结果表明:交通流量和转弯车比例对方案选择至关重要.与已有的文献研究结果不同,各种交通流量条件下串联设计都有着出色的表现.此外,串联设计在左转车比例适中的情况下是最优的车道分配方案,能有效地降低延误、平均停车次数和排队长度,但其比例不宜过高或过低.这些发现有助于科研人员和道路设计师定量地依据不同交通条件采用合适的设计方案以缓解交通拥堵.

关 键 词：delay T-INTERSECTION tandem design taffic flow turning proportion 

分 类 号：U491.51[交通运输工程—交通运输规划与管理]