铁道科学与工程学报2018，Vol.15Issue(3)：785-791,7.
基于安全合流概率的加速车道长度计算模型
Calculation model for the length of acceleration lane based on security merging probability
摘要
Abstract
In order to attain the safety length of acceleration lane at freeway for vehicles merging, the on-ramp vehicles' driving into freeway model was established and the critical headway of the traffic volume of main road shoulder lane was analyzed. Security merging probability of the merging vehicles on the acceleration lane was studied based on it. It revealed the influence law of acceleration lane length and the traffic flow of main road shoulder lane on the security merging probability combined with the distribution characteristics of main road vehicles. Finally, it validated the model and the Tianjin Section of Rong Wu Highway in on-ramp merging region is taken as an example. The results show that an increase in traffic volume will result in low security merging probability and the difficulties of lifting probability gradually raise under the condition of different traffic volume of main road shoulder lane. When the traffic volume of main road shoulder lane above is 400 veh/h?600 veh/h and the length of acceleration lane is 400 m, the security merging probability can basically meet the service demand. On the basis of this analysis, more length of the acceleration lane can not result in lifting of the merging probability.关键词
高速公路/临界间隙/加速车道/车流量/安全合流概率Key words
freeway/critical headway/acceleration lane/traffic volume/security merging probability分类
交通工程引用本文复制引用
李霞,朱志强,崔洪军,李霖..基于安全合流概率的加速车道长度计算模型[J].铁道科学与工程学报,2018,15(3):785-791,7.基金项目
国家自然科学基金资助项目(51678212) （51678212）
天津市交通运输科技发展计划项目(2017A-07) （2017A-07）
