山东建筑大学学报2017，Vol.32Issue(1)：33-38,6.
基于双层规划的快速路与周边路网协调优化
Expressway and surrounding road network coordinated optimization based on bi-level programming
摘要
Abstract
The coordinated optimization of each grade road system can effectively facilitate the sharing,cooperation and complement of the network structure and resources.On the basis of analyzing research status and existing optimization theoretical method of expressway tunnel system,this paper researches the reasons for the connection regional traffic "bottleneck" between urban expressway offramp and surrounding road network,establishes a bi-level programming model of the upper model for side road traffic diversion and the lower model for user equilibrium assignment,which is based on the thought of "divide traffic pressure,load transfer".The model considers some factors such as routing delay of distributed vehicles,interleaving delay and running delay of effected vehicles,and also gives a numeric example.The results show that the congestion of connection area traffic "bottleneck" is relaxed and the total system delay decreases substantially in the optimized-network,the average total delay of road network decreases significantly and its relatively non shunt decreases by 61％,and its relatively fixed shunt decreases by 50.1％.According to the proposed model,we can obtain the optimal diversion ration of auxiliary road.Finally,by combining the numeric example,the optimal diversion ration of auxiliary road can reach more than 0.9 when the off-ramp and side road traffic demand is 1500 pcu,and the surrounding road network lanes with sufficiently surplus capacity.When the traffic demand of off-ramp and side road surpasses 1500 pcu and restricted by the surrounding road network capacity,the auxiliary road diversion ration decreases with the increase of auxiliary road and off-ramp traffic volume.关键词
城市快速路/出口匝道/路网/双层规划/辅路分流Key words
urban expressway/off-ramp/road network/hi-level programming/auxiliary road diversion分类
交通工程引用本文复制引用
武可心,傅白白,岳贤飞..基于双层规划的快速路与周边路网协调优化[J].山东建筑大学学报,2017,32(1):33-38,6.基金项目
国家自然科学基金资助项目(71171124,71371026,71471104) （71171124,71371026,71471104）
