Abstract
In order to improve the road traffic congestion situation, a three-tier optimization model for urban road network is established from the angle of game relationship after analyzes the game relationship of traffic congestion of urban road network. The model takes the traffic congestion degree as the lower decision-making objective, takes the degree of traffic pollution impacted on the environment as the middle decision-making objective, and takes the economic cost as the upper decision-making objective. The upper-tier model is aimed at optimizing managers’ investment of the road network operation costs, the mediumtier model is strived to minimize the impact of traffic pollution on the environment, and the lower-tier model is strived to maximize the travel efficiency of road network. A genetic algorithm solution process is proposed for this model. Taking a regional road network in Nanjing as an example, the results show that the efficiency of the three-tier optimized road network is better than the original road network.
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