Research On Public Transport Signal Priority Control Method Based On IC Card And GPS Data

In recent years,with the rapid increase in the number of motor vehicles,the problem of urban traffic congestion in our country has become more and more serious.Developing public transportation and implementing public transportation priority is one of the effective measures to alleviate the problem of urban traffic congestion.However,the current traditional control method of bus signal priority at urban road intersections in our country is usually only for bus vehicles with absolute priority,not depending on the actual passenger capacity of the bus,so that the bus with a small number of passengers or even empty is also given priority,which violates the spirit of "transit priority" and does not conform to the concept of "people-oriented".Therefore,based on the bus IC card and GPS data,the actual passenger capacity of the bus is analyzed and determined,while considering the delay of all passengers passing the intersection,the study of a more humane bus signal priority control method is of great significance to the bus priority and the alleviation of traffic congestion.In this paper,the bus IC card,GPS and other dynamic operation data,as well as bus lines,bus stations and other static bus data were analyzed and processed.Then,using methods such as data fusion,spatial density clustering,time clustering,bus travel chain and passenger bus travel characteristics combination,passengers boarding and alighting stations data and the actual passenger capacity of bus was analyzed and calculated.After that,the actual bus load rate and the bus delay coefficient were used to construct the bus priority intensity coefficient,and the bus signal priority control optimization model with the goal of maximizing the reduction in total weighted per capita delay of passengers passing through the intersection was established.Then,the application of genetic algorithm was proposed to solve the problem.Finally,taking a four-road intersection in the main urban area of Chongqing as an example,the model was solved using actual bus data and field survey data,and the optimal solution was simulated and analyzed with VISSIM software.The research results show that compared with the current fixed signal scheme,the traditional bus signal priority scheme and the proposed bus signal priority scheme can reduce the per capita delay of passengers passing the intersection by 4.2s and 5.5s,respectively,with the reduction rates of 10.1% and 13.3%,respectively.The simulation effect of the proposed bus signal priority scheme was better than that of the traditional bus signal priority scheme.In addition,the bus signal priority scheme in this paper gives the bus a more reasonable prority to drive,and makes the green time loss of non-priority phases more balanced,so as to avoid the situation of traffic congestion caused by over-saturation due to the single phase bearing the green time loss,and optimizes the allocation of road and signal resources at the intersection.This paper is based on bus IC card and GPS data bus signal priority control optimization model is set up,compared with the traditional bus signal priority model,considering the actual operation situation of the single bus,more in line with the city of the concept of "bus priority",bus signal priority research on urban road intersections is timing method has certain complement.