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Evacuation Experiments under Different Visibility Conditions: Investigating Differences Between Individuals and Groups

机译:在不同的能见度条件下的疏散实验:调查个人和群体之间的差异

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Crowd is simplified as a collection of single individuals in many existed evacuation literatures. However, most of pedestrians actually move as social groups (e.g. family, friends, colleagues) and the existence of groups in crowd should not be neglected. In this paper, evacuation experiments were conducted in a room under various visibility levels. The fact that crowd contains individuals as well as groups is taken into account. Relationships among participants are investigated by SNA method. Quantitative and qualitative data including pre-movement time, travel time, moving speed and trajectories are analyzed and discussed. The experimental results show that travel time during evacuation is positively correlated with spatial locations, while pre-movement time depends largely on pedestrians' characteristics. The moving forms of groups have advantage over individuals when visibility is low. The pre-movement stage for groups is longer than individuals, but the travel speed for the former is faster than the latter under the worst visibility. Pedestrian's moving trajectory is zigzag bending curve in view-limited condition and its fluctuation degree increases with reduced visibility. Moreover, trajectories in group experiments have less fluctuations and the scope of moving area is larger than that in individual experiments. It is implied that evacuees hold a more stable mental state when moving in groups than evacuating individually. Group behaviors increase the possibility to actively explore information as well as space during evacuation in bad visibility.
机译:人群被简化为许多存在的疏散文献中的单个人的集合。然而,大多数行人实际上搬到社会群体(例如家庭,朋友,同事)和人群中的存在不容忽视。本文在各种可见性水平下在房间中进行了疏散实验。人群包含个人以及群体的事实被考虑在内。通过SNA方法调查参与者之间的关系。分析并讨论了包括预移动时间,旅行时间,移动速度和轨迹的定量和定性数据。实验结果表明,疏散过程中的行进时间与空间位置正相关,而前置时间在很大程度上取决于行人的特征。当可见性低时,移动形式的组有优势在个体上。组的前移动阶段比个体更长,但是前者的行驶速度比下一体在最差的可见度下更快。行人的移动轨迹是视角限制条件下的Z字形弯曲曲线,其波动度随着了解的降低而增加。此外,组实验中的轨迹具有较小的波动,移动区域的范围大于单个实验。暗示,撤离者在以群体移动而不是单独抽空时持有更稳定的心理状态。小组行为增加了在恶劣的能见度下积极探索信息以及空间的可能性。

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