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Bilevel Traffic Evacuation Model and Algorithm Design for Large-Scale Activities

机译：大型活动双层交通疏散模型及算法设计

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摘要

This paper establishes a bilevel planning model with one master and multiple slaves to solve traffic evacuation problems. The minimum evacuation network saturation and shortest evacuation time are used as the objective functions for the upper-and lower-level models, respectively. The optimizing conditions of this model are also analyzed. An improved particle swarm optimization ( PSO) method is proposed by introducing an electromagnetism-like mechanism to solve the bilevel model and enhance its convergence efficiency. A case study is carried out using the Nanjing Olympic Sports Center. The results indicate that, for large-scale activities, the average evacuation time of the classic model is shorter but the road saturation distribution is more uneven. Thus, the overall evacuation efficiency of the network is not high. For induced emergencies, the evacuation time of the bilevel planning model is shortened. When the audience arrival rate is increased from 50% to 100%, the evacuation time is shortened from 22% to 35%, indicating that the optimization effect of the bilevel planning model is more effective compared to the classic model. Therefore, the model and algorithm presented in this paper can provide a theoretical basis for the traffic-induced evacuation decision making of large-scale activities.
机译：本文建立了一个具有一个主从多个从机的双层规划模型，以解决交通疏散问题。最小疏散网络的饱和度和最短疏散时间分别用作上层和下层模型的目标函数。还分析了该模型的优化条件。通过引入一种类似于电磁的机制，提出了一种改进的粒子群优化（PSO）方法来求解双层模型并提高其收敛效率。使用南京奥林匹克体育中心进行了案例研究。结果表明，对于大型活动，经典模型的平均疏散时间较短，但道路饱和度分布较为不均匀。因此，网络的整体疏散效率不高。对于诱发的紧急情况，缩短了双层计划模型的疏散时间。当观众到达率从50％增加到100％时，疏散时间从22％缩短到35％，这表明双层计划模型的优化效果比经典模型更有效。因此，本文提出的模型和算法可以为大规模活动的交通疏散决策提供理论依据。

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  • 来源
    《Mathematical Problems in Engineering》 |2017年第6期|5049657.1-5049657.13|共13页
  • 作者

    Bao Danwen; Gu Jiayu; Jia Junhua;

  • 作者单位

    Nanjing Univ Aeronaut & Astronaut, Collage Civil Aviat, Nanjing 210016, Jiangsu, Peoples R China;

    Nanjing Univ Aeronaut & Astronaut, Collage Civil Aviat, Nanjing 210016, Jiangsu, Peoples R China;

    Nanjing Univ Aeronaut & Astronaut, Collage Civil Aviat, Nanjing 210016, Jiangsu, Peoples R China;

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