Analysis Method on Network Capacity of Belt Freeway

Shengwen Tu,Junjie Chen,Yao Zhang,Wen-Pei Sung,Tao-Yun Han

doi:10.1051/matecconf/201817503023

Abstract

An analysis method on network capacity of belt freeway based on road network reserve capacity is put forward in this paper. Through the introduction of multiple multiplier, the method can simply analyse the maximum traffic volume contained by belt freeway in the conditions of a given network basic demand and meeting the constraints of road traffic capacity and service level. In comparison to the traditional method, the proposed method takes into consideration actual network structure, OD flow distribution, the traveller choosing the way, etc. Additionally, the analysis conclusion is more consistent with the actual situation. Analysis results of belt freeway capacity of Yancheng city in China show that the presented method is not only simple and practical, but also can objectively reflect the status of the belt freeway capacity, and provide a basis for decision-making of belt freeway expansion and urban expressway construction.

Highlights

The belt freeway has an important position in the grouptype urban for connecting traffic organization, almost all through transportation need to pass the belt freeway to realize direction change, parts of entry and exit traffic transportation need to go through the belt freeway for evacuation, parts of long distance transportation between groups can reach the destination through the belt freeway; traffic volume of most urban belt freeway is quite concentrated, with heavy traffic load
The capacity of transportation network means the maximum space transfer capacity of people and objects provided by the entire transportation network within the limits of urban space and given the constraints of transportation facilities resources and environmental capacity, which is known as the capacity of road network or traffic capacity of road network [1].Scholars at home and abroad[2-7] have done a lot of researches on analysis calculation of the capacity of road network or traffic capacity of road network, and its main methods are space-time consumption method, linear programming method, cut set method, traffic distribution simulation method, narrow network capacity analysis method, etc
Where A is the set of links, ρa is a parameter denoting the pre-specified LOS required on link A,Ca is the capacity of link a,va(μ) is the flow on link a, which is obtained by solving the lower-lower user equilibrium (UE) assignment problem under a given reserve capacity multiplier μ, minimize

Summary

Introduction

The belt freeway has an important position in the grouptype urban for connecting traffic organization, almost all through transportation need to pass the belt freeway to realize direction change, parts of entry and exit traffic transportation need to go through the belt freeway for evacuation, parts of long distance transportation between groups can reach the destination through the belt freeway; traffic volume of most urban belt freeway is quite concentrated, with heavy traffic load. How to conduct quantitative analysis of belt freeway capacity is the real problem faced by planners and decision makers. The capacity of transportation network means the maximum space transfer capacity of people and objects provided by the entire transportation network within the limits of urban space and given the constraints of transportation facilities resources and environmental capacity, which is known as the capacity of road network or traffic capacity of road network [1].Scholars at home and abroad[2-7] have done a lot of researches on analysis calculation of the capacity of road network or traffic capacity of road network, and its main methods are space-time consumption method, linear programming method, cut set method, traffic distribution simulation method, narrow network capacity analysis method, etc.

Methods

Results

Conclusion