Research On Cross Section Arrangement And Alignment Optimization Of Interchange Ramp Based On Operation Safety And Efficiency Guarantee

With the continuous improvement of China's expressway network,the important role played by interchanges in the transformation of road network traffic has become increasingly prominent.Interchanges are closely related to the traffic capacity,operational safety and quality of road network vehicles.The ramp is an important part of the entire interchange,and the functional positioning of each ramp and its cross.section layout have become important considerations for the selection of interchanges.China has a vast territory,and the relevant standards and norms of expressways are universal.However,Jilin Province is located in the seasonal frozen soil area of Northeast China.It has a special geographical and climatic environment and traffic operation characteristics.It has special features in the cross.section layout of the ramps of interchanges.Demand.To this end,it is necessary to conduct in.depth research on the cross.section layout and line shape of the ramps in the interchange of Jilin Province.In 2016,the Transportation Department of Jilin Province issued the “Technical Guide for the Investigation and Design of the “13th Five.Year Plan” of Jilin Province”,which stipulates: “Pivot.type interchange,interchange of city.level and above.level cities and towns,one.way interchange The width of the ramp should not be less than 10.5m".Because the regulations are higher than the requirements of the current norms and rules,it is necessary to study and propose the 10.5m wide ramp cross.section layout optimization plan and linear indicators on the premise of meeting the current norms and rules,so as to clearly fit the expressway interchange interchange in Jilin Province.Cross.sectional form.This paper is divided into three aspects: one is the optimization study of the cross.section layout of the interchange of the interchange;the second is the optimization of the cross.track alignment of the interchange;the third is the main security measures for the interchange and entrance of the interchange.Using the driving simulation experiment and Autoturn simulation vehicle trajectory test,the advantages and disadvantages of different types of typical ramp cross.sections are analyzed in depth,and the recommended cross.section layout and linear indicators of the ramp are given.The main safety guarantee measures for the interchange and entrance areas of the interchange.Through the research of this paper,the more economical and effective methods can be used to improve the safety and traffic efficiency of the interchange.Provide quantitative analysis parameters and methods for both planning,design,construction and management of interchanges.In line with the objective needs of highway construction in Jilin Province in the coming period,it will contribute to the high.quality development of Jilin Highway.