Research And Simulation Of Urban Intersection Signal Control Based On Bus Priority

With the rapid development of social economy in our country,the problem of unbalanced demand and supply of urban road traffic is becoming more and more serious,resulting in more and more frequent occurrence of traffic congestion.In the face of these problems,urban public transport has become the key to the future development and transformation of urban transport because of its large passenger capacity and low per capita occupancy of resources.The bus priority signal control makes reasonable adjustments to the signal timing scheme at intersections so that buses can be given priority at intersections.For urban single intersections and trunk coordination intersections,this paper proposes corresponding control optimization control methods based on bus priority,and uses VISSIM software for simulation testing to evaluate and evaluate the designed solutions.The specific research content is as follows:1.Explained the basic concept,connotation and objectives of public transportation priority;introduced the basic concepts,setting principles and setting classification;From the two aspects of control objectives and control methods,the basic theory of public traffic priority signal control is described;It clarifies the classification and layout of bus priority application detectors when performing inductive signal control,as a theoretical basis for full-text research.2.For a single intersection,the minimum time per person at the intersection is the optimization goal to solve the cycle duration,and at the same time,the green signal ratio of each phase is determined according to the passenger flow ratio and saturation of each phase.Finally,a single intersection based on bus priority is established by combining the two.Timing signal timing optimization model.Based on this,the excess green time of the non-priority phase of the intersection is fully used to analyze and determine the control logic and control parameters of the green extension and red-light early-break strategy,and a single intersection-based induction based on bus priority is proposed.Signal control optimization method.3.For the mainline coordination intersection,based on the combination of the basic theory of line control and the bus priority signal control of the single intersection,the basic timing parameters of the main line coordination intersection are optimized,and an optimization method for the timing signal control of the main line coordination intersection based on bus priority is proposed.On this basis,the control logic and control parameters of the green light extension and the red light early break strategy are analyzed and determined by making full use of the excess green light time of the non coordinated phase of each intersection to ensure that the width of the green wave band of the coordinated direction of the traffic flow is not affected as the premise,and a main line coordination intersection based on the bus priority is proposed.The optimization method of mouth induction signal control.4.Selecting case intersections,collecting and arranging related basic data,using VIS SIM simulation software to model the analysis of signal control optimization methods based on bus priority single intersections and trunk coordination intersections proposed in this paper,and based on the results obtained from simulation tests evaluation analysis.