Research On Coordinated Control Method Of Non-common Period Trunk Line Based On Bayonet Data

With the rapid development of urbanization,in order to better implement road traffic management,checkpoint vehicle intelligent detection system has been applied to various cities.Through the checkpoint detection system,real-time license plate data,vehicle trajectory data,traffic flow of each road and the change of road operation state can be obtained,Efficient data collection and extraction can provide more accurate data support for arterial line coordination and optimization scheme.In general,the coordinated control scheme uses the historical data to design the cycle time and phase difference,which leads to the lag of the control and can not realize the dynamic real-time control.Therefore,how to make good use of the intelligent bayonet data to make the traffic control more active is very important.In this paper,we will study the short-term traffic flow prediction method of arterial line by using the detection data of intelligent traffic checkpoint on road sections and intersections,so as to realize the data "initiative".Then real-time data is used to analyze the actual traffic demand of different intersections of the main line.When there are "active" data,the arterial line coordinated control scheme can be optimized in one step.The existing arterial line coordinated control optimization methods have been studied a lot.The optimization direction is usually from the two aspects of maximizing the green wave band and minimizing the arterial line system delay,but the two optimization directions are based on the constraints of the common cycle,The public cycle time generally selects the largest and best cycle time among multiple intersections.Due to the influence of geographical factors,the size and actual traffic volume of each intersection are different,which will inevitably lead to a waste of time and space,Therefore,this paper studies the coordinated control model of non-public cycle,breaks the time limit of public cycle,and provides a new idea for the follow-up study of arterial line coordinated control.Firstly,it summarizes the research status of arterial line coordinated control at home and abroad,analyzes the advantages and disadvantages of different methods,and puts forward the main research content and technical roadmap of this paper.Secondly,the important parameters of coordinated control are analyzed,and the correlation between the parameters is obtained,which provides a theoretical basis for the follow-up short-term traffic flow prediction;Then,the actual types of intersections are analyzed,and the re classification work and the division of traffic districts are carried out according to the research in this paper.This paper studies and analyzes the existing od prediction model of traffic district,analyzes its characteristics and optimizes its parameters,and establishes a short-term traffic flow prediction model suitable for arterial lines,which provides data support for the subsequent establishment of non-public periodic coordinated control scheme.Then,the paper explains the coordination control mechanism of non-public cycle arterial lines,deduces the constraints between intersections when non-public cycle is used,and establishes the basic parameters of non-public cycle model and the correlation between parameters.The delay analysis of the non-public periodic time chart is carried out,and the optimization objective function is established.Based on the idea of dynamic programming and the above parameters,a non common period arterial line coordinated control model is established.In order to maximize the perfection of the model,the green signal ratio of the scheme calculated by the model is modified,and the model is established.Finally,in order to verify the effectiveness of the model,the actual road sections are selected for simulation experiments.The results show that: compared with the public cycle coordinated control model,the average vehicle delay,the total delay of the arterial system and the average number of stops are reduced after the implementation of the nonpublic cycle coordinated control,which proves the effectiveness of the non-public cycle coordinated control,It provides a new idea for coordinated control of arterial line.