Continuum dynamic traffic models with novel local route-choice strategies for urban cities
针对城市交通动态分配问题，提出两种基于局部交通感知的路径选择策略，并建立连续动态模型，通过数值方法求解，与传统全局策略对比。
In dynamic traffic assignment problems, travelers choose routes that minimize their cost of traveling to their destination. In traditional continuum models, travelers have a global perception of traffic; in this study, two novel reactive route-choice strategies are devised in which travelers have a local perception of traffic. In Strategy A, travelers identify a set of feasible temporary destinations that are equidistant from their final destination, and then choose an optimal path within the local perception region that minimizes their cost of traveling to the temporary destination set. In Strategy B, travelers identify a direct path that they can follow to move closer to their final destination within a short, fixed time. These route-choice strategies are used to formulate complete continuum dynamic models for traffic flows in an urban city that consist of a conservation law and a set of eikonal equations or optimization problems involving ordinary differential equations. High-order numerical schemes and suitable solution algorithms are applied to solve these equations on unstructured triangular meshes. Numerical examples are also presented to compare the novel local route-choice strategies with traditional global strategies.