Liu Mingwei, Lu Guiliang, Yoshinao Oeda
Shanghai Ocean University, Shanghai, China.
Kyushu University, Kyushu, Japan.
Sci Rep. 2024 May 13;14(1):10847. doi: 10.1038/s41598-024-61007-4.
Comprehending crowd dynamics on staircases is imperative for preventing accidents, particularly in emergency scenarios. In this context, our study delves into bi-directional pedestrian flow. When confronted with limited staircase space, the occurrence of two distinct lanes-one for upstairs and another for downstairs-is a common observation. However, there has been no quantitative investigation conducted to understand this phenomenon. To facilitate such an analysis, we employ a velocity-based personal space model that accurately reproduces the formation of upstairs and downstairs lanes in bi-directional staircases. The study of lane formation mechanisms and the exploration of factors influencing deadlock are essentially two sides of the same coin. This is due to the fact that, the occurrence of deadlock signifies a disruption in the anticipated lane behavior during counter flow. As a result, we have devised various scenarios to meticulously analyze the factors contributing to both deadlock formation and its subsequent performance. This involves manipulating parameters such as speed, speed dispersion, pedestrian count, initial density, right-hand preference weight, minimum personal space size, same-direction following intensity, and time step. The findings hold the potential to enhance the overall quality of service in stairway movement and offer significant contributions to the understanding and management of pedestrian behavior in such settings.
理解楼梯上的人群动态对于预防事故至关重要，尤其是在紧急情况下。在此背景下，我们的研究深入探讨双向人流。当楼梯空间有限时，会出现两条明显的通道——一条用于上楼，另一条用于下楼——这是常见的观察结果。然而，尚未进行定量研究来理解这一现象。为便于进行此类分析，我们采用基于速度的个人空间模型，该模型能准确再现双向楼梯上上下楼通道的形成。通道形成机制的研究和影响僵局因素的探索本质上是同一问题的两个方面。这是因为，僵局的出现意味着逆流期间预期通道行为的中断。因此，我们设计了各种场景来细致分析导致僵局形成及其后续表现的因素。这涉及操纵速度、速度离散度、行人数量、初始密度、右手偏好权重、最小个人空间大小、同向跟随强度和时间步长等参数。这些发现有可能提高楼梯通行的整体服务质量，并为理解和管理此类场景中的行人行为做出重大贡献。
