基于出行时间预算的SUE交通分配

SUE traffic assignment model based on travel time budget

基于均匀分布的路段容量,分析了降级路网中路段和路径出行时间的随机变动,假定出行者根据以往的出行经验获取路径出行时间的可变性,并以出行时间预算的形式将这种可变性纳入到其路径选择过程中,进而定义路径出行时间预算为路径出行时间均值与出行时间安全边际之和.在此基础上,采用变分不等式技术构建了基于出行时间预算的多用户类型弹性需求随机用户均衡交通分配模型,并证明了模型解的等价性.

Link and route travel time distributions in a degradable road network are analyzed by assuming that link capacity follows a uniform distribution. We propose that travelers acquire the variability of route travel time based on past experiences and factor variability into their route choice consideration in the form of a travel time budget, which is the summation of the mean route travel time and a travel time safety margin. This study then formulates a travel time budget-based stochastic user equilibrium traffic assignment model with multiple user classes and elastic demand as a variational inequality problem, in the meanwhile, the equivalence of the proposed VI model is proved.