Research On BRT Priority Control Based On Intersection Dual Platforms

With the rapid development of urban bus operation,the operational efficiency of BRT,as the most critical indicator in its system,has been receiving much attention.Due to the influence of social traffic flow and traffic light control at intersections,BRT stop and wait for green lights at intersections.Vehicles stop and go,low average operating speed,intersection exhaust pollution,and poor driving service levels seriously restrict BRT.The rapid transit system is efficient,fast and environmentally friendly.Therefore,how to further improve BRT priority efficiency and reduce signal timing interference at intersections has important research value.This article sets up BRT platforms at the entrance and exit of the signalized intersection.When the BRT encounters a red light,it can use the red light to stop at the entrance platform.When it encounters a green light,it can be stopped at the exit platform through the intersection.The "double compensation" priority control method of the platform's BRT speed guidance and signal timing is used to correct the BRT's travel deviation to ensure its operating punctuality.On this basis,the optimal platform docking plan for collaborative optimization of vehicle speed and timing is studied,combined with an example for analysis,and the effect of different control methods on BRT priority is discussed.The specific research contents of this article are as follows:(1)Research on setting up BRT dual platforms.The geometric characteristics of the BRT dual platform at the signalized intersection,the basic principles and methods of installing the BRT dual platform at the intersection are introduced;then the BRT is carried out at the intersection of Laoxi West Road-Guanghua Street and Lanling North Road-Qingliang West Road in Changzhou The example of the double platform improves the design;finally,the advantages of the double platform are compared and compared through the analysis of the delay of the BRT vehicles in different settings.(2)Research on BRT pre-dock plan and operation schedule.First,define the parameters of the BRT pre-stop plan and timetable,and then on this basis,analyze the mechanism of its pre-stop plan and timetable,and finally give an example analysisbased on the traffic data of the field survey,and give priority to the current methods and signals Comparison of BRT travel analysis between the method and the dual-platform method.(3)Research on "Double Compensation" Method of BRT Vehicle Speed Guidance and Signal Timing.First,the basic theory of BRT speed guidance is summarized,and the driving status of BRT speed guidance is analyzed;secondly,the BRT signal timing compensation priority strategy is introduced,and it is combined with speed guidance;then consider the case of randomness of stop time,Implement the "double compensation" method of BRT speed guidance and signal timing proposed in this article,and finally verify the article by comparing the BRT travel analysis of three control methods in different deviation ranges(± 5s,± 10 s,± 20s)The effectiveness of priority control methods.(4)Research on BRT optimal platform docking plan.First establish the BRT priority coordinated control constraint programming model,and give the constraints and objective functions of the model;then under the actual road space conditions and signal timing conditions,Lingo linear programming software is used to optimize the examples and obtain the optimal method Results;Finally,using travel time and delay as evaluation indicators,the analysis results of the current method,BRT dual platforms method and optimization method are compared.