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

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.