摘要
为了提高高速公路养护作业区的服务水平,基于VISSIM建立设计速度为120km·h^-1双向四车道高速公路养护作业区交通仿真模型,经对比选取作业路段饱和度、平均车速、交通密度、平均行程延误作为评价高速公路养护作业方案的服务水平指标,并采用动态综合评价法分析确定养护作业区的工作区长度。结果表明：在封闭外侧车道,作业区采用逐级限速（60-80km·h^-1）条件下,得出在不同交通量和大车率的情况下工作区长度阈值和路段服务水平的对应关系;在封闭半幅车道条件下,考虑到大型车的行驶特性,作业区采用逐级限速（40-80km·h^-1）模式,同一交通量和大车率水平下,相应工作区长度对应的服务水平较封闭外侧车道模式低,并得出不同交通量和大车率情况下工作区长度阈值和路段服务水平的对应关系;研究结果可为高速公路养护作业交通组织方案的工作区长度的确定提供参考。
In order to improve the service level of expressway maintenance work zone,based on VISSIM to create and design a traffic simulation model with speed of 120km·h^-1 two-way fourlane expressway maintenance work zone,work saturation,average speed,traffic density and average travel delay of chosen road were contrasted and selected as the service level evaluation indexes of expressway maintenance scheme.The length of the maintenance work zone was analyzed and determined by dynamic comprehensive evaluation method.The results show that under the conditions of the outer lane closure mode and the work zone using the progressively speed limit（60-80km·h^-1）,the correspondence relationships of work zone length threshold value and service level under different traffic volumes and carts rates are obtained;under the conditions of the half road closure mode,taking into account the driving characteristics of oversize vehicle and the work zone using the progressively speed limit（40-80km·h^-1）mode,it is foundthat the service level of corresponding work zone length is lower than that in the outer lane closure mode under the same traffic volume and carts rate and the correspondence relationships of work zone length threshold value and service level under different traffic volumes and carts rates are obtained.The results can provide a reference for work zone length determination of the expressway maintenance for traffic organization scheme.
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2016年第5期130-136,共7页
China Journal of Highway and Transport
基金
河南交通投资集团有限公司科技项目
关键词
交通工程
工作区长度
交通仿真
养护作业区
动态综合评价
traffic engineering
work zone length
traffic simulation
maintenance work zone
dy namic comprehensive evaluation
