基于行程质量的随机用户平衡分配模型

提出行程质量的概念以描述出行者在不确定环境下的路径选择准则。将行程质量定义为行程时间和行程时间可靠性的线性加权和,综合了影响路径选择的两个不同的重要因素:行程时间和行程时间可靠性。假定在路段通行能力随机变化的情况下出行者以估计行程质量费用最小作为路径选择的标准,建立了基于行程质量的随机用户平衡分配模型。证明了模型解的等价性和唯一性,给出了求解模型的MSA算法。在一个小型测试网络上的计算结果表明:模型能够反映出行者在随机路网中的路径选择行为。

Stochastic user equilibrium assignment model based on travel trait

The concept of travel trait is introduced to describe travelers' route choice criteria under uncertain environments.The travel trait is defined as the linear weighted sum of the travel time and travel time reliability.Authors integrate two different important factors that have significant impacts on the route choice:the travel time and travel time reliability.Assuming travelers' standard of choosing the path which perceives travel trait cost is minimized due to stochastic variations of link capacities,a stochastic user equilibrium assignment model based on travel trait is formulated.The equivalence and uniqueness of the solution of model are demonstrated.Then,MSA algorithm is cooperated with the model.Numerical results of a small network show that the proposed model can reflect the travelers' route choice behavior in stochastic road networks.