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Optimization of Evacuation Traffic Flow Distribution Based on Road Fundamental Diagram

机译：基于道路基本图的疏散交通流分配优化

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The spatial distribution of evacuation traffic may be unbalanced because there are many factors such as rumor, imperfect information, and personal preference, that may impact the destination choice of evacuees. Consequently, some roads may be over-saturated while other roads are not fully utilized. Such phenomenon lead to "Liebig's barrel" that the slowest evacuation flow negatively influences the efficiency of evacuation since it prolongs the clearance time. In this paper, we focus on the optimization of traffic flow distribution in space. First, we define evacuation exits as specific roads between origin and destination of evacuation traffic. Then, according to speed-flow relationship derived from fundamental diagrams at every evacuation exit, we propose an evacuation destination choice model. Finally, a case study is conducted to validate the method. Results of the case study demonstrate that this method is able to reduce clearance time and improve average travel speed for vehicles during mass evacuation.
机译：疏散交通的空间分布可能不均衡，因为谣言，信息不完善和个人偏爱等许多因素可能影响撤离人员的目的地选择。因此，某些道路可能会变得过饱和，而其他道路却没有得到充分利用。这种现象导致“李比希的发条盒”，最慢的疏散流会延长疏散时间，从而对疏散效率产生负面影响。在本文中，我们专注于优化空间中的交通流分配。首先，我们将疏散出口定义为疏散交通起点和目的地之间的特定道路。然后，根据每个疏散出口基本图得出的速度-流量关系，提出了疏散目的地选择模型。最后，进行了案例研究以验证该方法。案例研究结果表明，该方法能够减少疏散时间并提高大规模疏散期间车辆的平均行驶速度。

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