基于交通状态的绿灯间隔时间的优化算法  

Optimization algorithm of green light interval based on traffic condition

作　　者：李铁军[1] 常旭[1] 

机构地区：[1]长安大学公路学院,陕西西安710064

出　　处：《长安大学学报（自然科学版）》2016年第3期81-85,共5页Journal of Chang’an University(Natural Science Edition)

基　　金：陕西省自然科学基金项目(213021150270)

摘　　要：为了确定不同交通状态下绿灯间隔时间,最大限度地提高交叉口通行能力,提出了使用交通量替代来车速度输入运动学方程的计算方法,根据道路交通流所处状态的不同,分别采用格林希尔茨模型、格林伯格模型和安德伍德模型分析绿灯间隔时间与交通之间的关系,从而建立不同交通状态下,不同交通量的绿灯间隔时间计算方法;并结合西安市小寨路—长安路交叉口早高峰数据,对在原算法及改进后算法计算的信号配时条件下的运行状况进行VISSIM仿真。研究结果表明:改进后条件下通过交叉口的车辆数、平均速度有显著提高,阻塞百分比显著降低;该优化算法能够优化绿灯间隔时间,提高交叉口通行能力。In order to determine the green light interval time in different traffic states and greatly improve the traffic capacity at intersection,a calculation method which replaced speed with traffic flow into kinematical equation was put forward.Greenshields model,Greenberg model and Underwood model were used to analyze the relationship between green light interval time and traffic according to different conditions of traffic volumes.A calculation method of green light interval time was established under different traffic conditions and volumes.Combining the traffic volume data of the intersection in morning rush hour in Xiaozhai Road and Chang’an Road in Xi’an City,VISSIM simulation on running state under signal timing conditions based on original and improved algorithm was conducted.The results show that the new model can significantly improve the passing vehicle numbers,enhance the average velocity and reduce the block percentage at intersection.So the method can optimize the green light interval time and improve the traffic capacity of intersection.2tabs,3figs,20 refs.

关 键 词：交通工程 绿灯间隔时间 交通状态 黄灯时间 全红时间 优化 

分 类 号：U491.51[交通运输工程—交通运输规划与管理]