Semi-physical Dynamic Simulation of Bus Pirority Control

In recent years,with Chinese social and economic development，the problem ofurban traffic jams is increasingly serious. As an important means of effective solutionto the problem of traffic congestion, bus signal priority become a research hotspot.But the existing bus priority control methods have kinds of shortcomings, and alsolack of appropriate simulation platform to complete the real-time simulation ofdynamic traffic flow. In order to solve the above problems, this paper to establish theactual traffic conditions in line with our semi-physical dynamic simulation platformfor research, study the following:Firstly, the existing bus priority control method based on detailed analysis of theproposed control method based on optimization and rule-based adaptive bus priority,and to design genetic chaos optimization algorithm to calculate the key parameters;Secondly, this paper seriously explores the parameter setting method in theVISSIM traffic simulation software, and by using the sample of Shaoshan-XiangfuRoad intersection,Changsha City, Hunan Province, re-calibration of the additionalfactor bx _ad and bx _mu of the safe distance of the intersection of the saturationflow rate and multiplierto make it consistent with China’s actual traffic conditions;Tirldly, This paper presents a prototype design of a layered software architectureof the traffic signal control method; of VISSIM COM interface to several common bussignal priority algorithm. On this basis, the development of bus prioritycontrol-the-loop dynamic simulation platform;At last, this paper achieve a semi-physical dynamic simulation,. by using thesample of Shaoshan-Xiangfu Road intersection,Changsha City, Hunan Province,Differences by use of different bus priority control methods, to compare theirsimulation results, analysis of the obtained optimal bus priority control method;Finally,the lack and future of this Paper are brief discussed．