Analysis Of The Connection Between Truck Roads And Urban Roads In Nanchang City

With the development of urbanization in China,the urban road sections of the provincial highway begin to assume the function of urban transportation while undertaking the external transportation.Nowadays,in order to achieve the integration of traffic inside and outside the city,the expressway has been able to connect with the fast road network of the city.In the case that the fast and slow traffic cannot be separated and operated,How to connect the highway network with the urban road network is very important.The connection between ordinary trunk roads and urban roads is mostly connected by plane intersections.There are many mutual interference conflicts at the intersection,so traffic organization is very important.The intersection is the node of the urban road network.The node congestion problem can be extended to the regional road network,so the intersection traffic organization should use the optimal solution.This paper studies the traffic organization optimization of the intersection of trunk highway and urban road,and this is of practical significance for strengthening the connection between roads and urban roads.Based on relevant research at home and abroad,the paper uses mature models and algorithms to study such traffic connection problems.Firstly,the paper analyzes the differences between the main road and the urban road and the traffic characteristics of the junction,and puts forward the guiding ideology of traffic optimization.Secondly,the paper selects several intersections in Nanchang for investigation and simulation,and evaluates the traffic optimization schemes of six junctions through the simulation software VISSIM.Third,combined with the guiding ideology,the paper puts forward a general scheme of traffic optimization at planar intersections.The paper proposes a technical solution combining macro and micro.At the macro level,the plan is designed from the aspects of road network planning,traffic guidance,new connection lines,passenger and freight diversion.The paper proposes that the trunk highway should be designed according to the red line of the urban planning,and should combine the characteristics of urban traffic.The highway road should adopt high-tech standards.The traffic guidance information screen should be set at the entrance of the city.Traffic management should be done well.At the micro level,the scheme is designed from the aspects of the connection section,the form of the connection point,signal timing and phase design,and widening channelization of the link section.The paper puts forward that the high limit should be adopted in determining the technical standard and the room for development should be left.The maneuverability of large trucks should be considered in the signal timing design of planar intersections.At the junction point between the main highway and the city road,the traffic organization can be carried out by the method of far turning to the left.The paper puts forward the blocking scheme in the macroscopic and micro level,considers the transitional form of the connecting point,and ensures the feasibility of the blocking scheme.The research results have reference significance for improving road network convergence and traffic congestion.