Modified stochastic user-equilibrium assignment algorithm for urban rail transit under network operation  

作　　者：朱炜 胡昊 徐瑞华 洪玲 

机构地区：[1]Center of Transportation Research,School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University [2]School of Transportation Engineering,Tongji University

出　　处：《Journal of Central South University》2013年第10期2897-2904,共8页中南大学学报（英文版）

基　　金：Project(2007AA11Z236) supported by the National High Technology Research and Development Program of China;Project(2012M5209O1) supported by China Postdoctoral Science Foundation

摘　　要：Based on the framework of method of successive averages(MSA), a modified stochastic user-equilibrium assignment algorithm was proposed, which can be used to calculate the passenger flow distribution of urban rail transit(URT) under network operation. In order to describe the congestion's impact to passengers' route choices, a generalized cost function with in-vehicle congestion was set up. Building on the k-th shortest path algorithm, a method for generating choice set with time constraint was embedded, considering the characteristics of network operation. A simple but efficient route choice model, which was derived from travel surveys for URT passengers in China, was introduced to perform the stochastic network loading at each iteration in the algorithm. Initial tests on the URT network in Shanghai City show that the methodology, with rational calculation time, promises to compute more precisely the passenger flow distribution of URT under network operation, compared with those practical algorithms used in today's China.Based on the framework of method of successive averages(MSA), a modified stochastic user-equilibrium assignment algorithm was proposed, which can be used to calculate the passenger flow distribution of urban rail transit(URT) under network operation. In order to describe the congestion’s impact to passengers’ route choices, a generalized cost function with in-vehicle congestion was set up. Building on the k-th shortest path algorithm, a method for generating choice set with time constraint was embedded, considering the characteristics of network operation. A simple but efficient route choice model, which was derived from travel surveys for URT passengers in China, was introduced to perform the stochastic network loading at each iteration in the algorithm. Initial tests on the URT network in Shanghai City show that the methodology, with rational calculation time, promises to compute more precisely the passenger flow distribution of URT under network operation, compared with those practical algorithms used in today’s China.

关 键 词：urban rail TRANSIT STOCHASTIC USER equilibrium ASSIGNMENT ALGORITHM method of successive AVERAGES network operation 

分 类 号：U293[交通运输工程—交通运输规划与管理]