动态广义出行费用随机用户平衡  

Dynamic generalized travel cost stochastic user equilibrium

作　　者：李小静[1] 刘林忠[1] 

机构地区：[1]兰州交通大学交通运输学院,兰州730070

出　　处：《哈尔滨工业大学学报》2016年第9期101-106,共6页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金(71361018);兰州交通大学青年基金(2016019)

摘　　要：为描述弹性需求下降级路网中出行者路径选择行为,为出行者和管理者提供决策参考,采用行程时间、行程时间可靠性及货币费用的加权和定义动态广义出行费用.假定在路网随机变化的情况下,出行者以估计广义出行费用最小为路径选择标准,建立基于动态广义出行费用的随机用户平衡模型,并给出求解模型的MSA算法.通过在一个算例路网上测试,结果表明:出行者对待风险的不同态度、降级系数和货币费用均对道路流量分配影响显著,并与经验相吻合,说明所提出的基于动态广义出行费用的随机用户平衡模型能够真实反映出行者在随机路网中的路径选择行为.For the sake of describing route choice behavior of travelers under degradable network wlm elasuc demand and providing decision references for travelers and managers, the dynamic generalized travel cost is defined as the weighted sum of travel time, travel time reliability and monetary cost. Due to random variations of road networks, travelers are assumed to choose their optimal routes while their generalized travel costs are minimized. Under those assumptions, a stochastic user equilibrium model based on dynamic generalized travel cost is developed. The MSA （ method of successive average） algorithm for the model is also proposed. Through a test on an example road network, numerical results show that travelers＇ risk attitudes, degradation factor and monetary cost have significant influences on road traffic assignment. It is consistent with practical experiences, so it illustrates that the presented stochastic user equilibrium model based on dynamic generalized travel cost can truly reflect travelers route choice behavior on stochastic road network.

关 键 词：交通工程 随机用户平衡 MSA算法 降级路网 广义出行费用 

分 类 号：U491[交通运输工程—交通运输规划与管理]