Layout Optimization Model of Accident Rescue Stations in Expressway Network

The layout optimization model of practical rescue stations in expressway network is discussed through establishing layout principles of rescue station and some basic assumptions.The network is divided into difference forms by using the improved Dijkstra algorithm and screening out the optimal road nodes based on the greedy algorithm.The practical characteristics of expressway are considered in this model.Furthermore,the calculating speed is rapid and different kinds of network topology are universally compatible to the model.