Study On The Composite Interchange Scheme In Huashan North Of Guangle Expressway And Traffic Safety Analysis

Highway nodes become "bottleneck" road in the highway network,and affecting the traffic capacity and traffic safety of the entire highway,With the acceleration of urbanization,more and more new interchanges will be added to expressway networks in urban areas.Due to the fact that the distance between adjacent interchanges is too small,there is a serious phenomenon of interweaving,which does not guarantee the smooth running of vehicles.If two interchanges set as composite interchange,that will improve road capacity.Based on the Guangle Expressway,this paper studies the Huashan North composite interchange project.Firstly,through the research status,this paper defines the composite interchange,analyzes the setup conditions of the composite interchange,considers the basic design principles of the overall design,and studies the influencing factors of the positioning and selection of the composite interchange.Then,the natural conditions such as topography,geomorphology,geology,and climate in the interchange area of Huashan North in the Guangle Expressway and the surrounding major highway network and other infrastructure were analyzed.Secondly,based on traffic volume forecasting data,factors such as distance space requirements for interoperability between Airport North interchange and Huashan North interchange,project scale control for composite interchange,demolition volume control,and standards requirements for ramps are taken into consideration and provides three options.Through the technical and economic comparison,the recommendation of the Huashan North composite interchange is proposed.Finally,in order to ensure the safety and security of the interoperating traffic operation,the traffic organization is conceived.In order to ensure that the construction of the project will have the least impact on the surrounding expressway,the project will be evaluated for safety.According to the "Road Capacity Manual",it calculates and analyzes the speed and service level of the interchange area,and proposes security measures and conclusions.