基于道路交通状态的随机用户平衡

运用随机用户平衡配流的基本思想和交通流理论，提出了道路交通状态的概念，以便讨论交通拥挤情况下的交通量分配问题．将道路交通状态定义为行程时间和道路拥挤度的线性加权和．假定在路网随机变化的情况下，出行者以行程时间和道路拥挤度最低为路径选择准则，建立了基于道路交通状态的随机用户平衡配流模型，并证明了模型的等价性和唯一性，给出了该模型的连续平均求解算法．一个小型网络的数值计算结果表明，该模型能反映出行者在随机路网中的路径选择行为．

Stochastic User Equilibrium Assignment Based on Traffic State

Based on the basic idea of stochastic user equilibrium assignment and the traffic flow theory,the concept of road traffic state was introduced in order to describe the problem of traffic assignment.The road traffic state was defined as the linear weighted sum of travel time and traffic congestion degree.Based on the assumption that under stochastic variations of link capacities,passengers' standard to choose a route is the minimization of travel time and traffic congestion degree,a stochastic user equilibrium assignment model based on road traffic state was proposed.The equivalence and uniqueness of the solution of the proposed model were demonstrated,and an algorithm for the model was given.The numerical results for a small traffic network show that the proposed model can reflect the passengers' routing behavior in a stochastic road network.