应急物流优先的交通分配模型及算法

Traffic Assignment Model Based on Priority of Emergency Logistics and Its Algorithm

摘要:

提出了一种应急物流车辆优先通行的交通分配模型，并给出对应的求解方法。在交通网络上，应急物流车辆的路径选择服从Cournot?Nash（CN）原则，具有优先通行权，同时构成一个应急物资运输总时间最小化的共同体；其他社会车辆充分配合应急物流车辆的优先权，在满足应急物流车辆优先通行的前提下，路径选择服从Wardrop用户均衡（UE）原则，实现个体通行成本最小化。所提出的UE?CN混合交通分配模型解可能不唯一，因此设计了算法。最后，通过简单的算例验证了模型和算法的合理性。

关键词:应急物流;社会车辆;交通分配;UE‒CN混合均衡

Abstract:

A traffic assignment model for the priority of emergency logistics was proposed， and a corresponding numerical method was designed. In a general transportation network， the route choice of emergency logistics follows the Cournot-Nash （CN） principle in which emergency logistics minimizes the overall cost/time of emergency logistics. Other social vehicles respect the priority of emergency vehicles， and then follow the Wardrop user equilibrium （UE） principle aiming at minimizing their own travel cost， by giving prior right of traveling to emergency vehicles. The proposed UE-CN mixed traffic assignment model may not have unique solution， and an algorithm was designed for solving the model. Finally， the effectiveness of the model and algorithm was verified through numerical examples.

Key words:emergency logistics;social vehicles;traffic assignment;UE-CN mixed equilibrium