摘要
立体复合式高速公路通过立体层与平面层双层高速并行,因地形、走廊及结构所限,存在左入左出布设。为研究左入左出的适用性,采用VISSIM微观仿真分析方法,以车辆通过匝道连接段的通行时间、延误时间、排队长度为评估指标,对比分析了不同服务水平、匝道汇入比率和车辆组成等组合场景下的交通运行状况,提出了条件受限下左入左出可替代右侧连接方式的车辆组成和匝道汇入比率。结果表明:1)条件允许情况下,应尽可能采用右侧连接方式;2)条件受限情况下,左入的最优客货比例和车辆匝道汇入比率宜分别为9:1和1:1,左出的最优客货比例和匝道汇入比率宜分别为8:2和3:7。
The parallel high-speed operation of the stereo-compound expressway is performed through the stereo-level and the ground-level,which has a left-in and left-out layout due to terrain,corridor,and structural constraints.In order to study the applicability of left-in and left-out,this paper adopts the VISSIM micro simulation analysis method,uses the travel time,delay time and queue length of vehicles passing through the on-ramp connecting section as evaluation indexes,compares the traffic performance of different combinations of service levels,ramp merging ratio and vehicle composition,and put forward the composition of vehicles and the ramp merging ratio that left-in and left-out can replace the right-in connection mode under the restricted conditions.The results show that:1)Under the conditions permitted,the right-side connection should be adopted as far as possible;2)Under limited conditions,the optimal passenger-cargo ratio and on-ramp inflow ratio of left-in should be 9:1 and 1:1 respectively,the optimal passenger-cargo ratio and on-ramp inflow ratio for the left-out should be 8:2 and 3:7 respectively.
作者
雷青
王昭勇
吴玉荣
骆中斌
LEI Qing;WANG Zhaoyong;WU Yurong;LUO Zhongbin(Tongren Highway Administration Bureau of Guizhou Province,Tongren 554300;Guizhou Provincial Highway Bureau,Guiyang 550001;China Merchants Chongqing Communications Technology Research&Design Institute Co.,Ltd.,Chongqing 400067)
出处
《公路交通技术》
2024年第2期26-32,共7页
Technology of Highway and Transport
基金
国家重点研发计划项目(2022YFFO604905)
贵州省公路局科技项目(2024QLK09)
重庆市技术创新与应用发展专项重点项目(cstc2021jscx-gksbX0057)。
关键词
立体复合式高速公路
连接道
左入左出
适用性
stereo-compound expressway
connections
left-in and left-out
applicability
