Research On The Division Method Of Coordination Sub-areas Of Trunk Line In Near Saturation State

The implementation of arterial line coordination under the condition of nearsaturated roads is an important part of urban road traffic control and management,and the division of sub-zones is the basis of arterial line coordination.How to accurately divide the sub-areas and how to perform demand analysis on the sub-areas,so that the divided sub-areas can optimize the allocation of road time and space resources to the greatest extent after signal coordination.These are the focus of this paper.First of all,a correlation model of intersections in the near-saturated state is established.Intersection correlation is the basis of sub-zone division,but the actual demand for sub-zone division is ignored.In this paper,by studying the influence of nearsaturated traffic flow characteristics in the sub-region on the benefit of signal coordination,the correlation model of red wave and green wave intersections is established.Then combined with the traffic flow discrete theory,considering the influence factors of urban roads,using Vissim,Matlab,Spss,Excel software to improve,and apply it to the calculation of correlation.Secondly,a subdivision model based on the degree of intersection correlation is established.The sub-area division model can get the final plan,but the current sub-area division algorithm is not accurate enough and more complicated.Considering the characteristics of road sub-zone division,based on the traversal algorithm,combined with the theory of secondary division,a preliminary division model of sub-zones,red wave and green wave sub-zone sub-division models are established,and a detailed division process is finally designed.Finally,the instance verification is completed.Taking Jinan South Industrial Road as an example,with the help of vissim software,the signal control simulation of the subarea division plan and the evaluation of the control effect are carried out.The results show that the traffic operation level of arterial roads has improved significantly,vehicle delays have been reduced by 33.2%,parking times have been reduced by 44.8%,and travel distances have been reduced by 33.2%.The time is shortened by 12.6%,and the traffic efficiency is better than other sub-zone division schemes,which verifies that the model established in this paper is feasible and effective,provides theoretical foundation and reference value for theoretical research and practical engineering application,and enriches the research of sub-zone division technology.Ideas and methods.