Investigation of pedestrian evacuation scenarios through congestion level and crowd dang

Authors

  • Claudio Feliciani Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan
  • Katsuhiro Nishinari Research Center for Advanced Science and Technology, The University of Tokyo 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan and Department of Aeronautics and Astronautics, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan

DOI:

https://doi.org/10.17815/CD.2020.45

Keywords:

evacuation, congestion, intrinsic crowd risk, collective motion, experimental investigation

Abstract

In this paper, we present two quantities aimed at numerically describing the level of congestion and the intrinsic risk of pedestrian crowds. The congestion level allows to assess the smoothness of pedestrian streams and recognize regions where self-organization is difficult or not possible. This measure differs from previous attempts to quantify congestion in pedestrian crowds by employing velocities as vector entities (thus not only focusing on the absolute value). The crowd danger contains elements related to congestion, but also includes the effect of density, consequently allowing to asses the risks intrinsically created by the dynamics of crowds. Details on the computational methods related to both quantities are described in the paper and their properties are discussed. As a practical application, both measures are used to investigate supervised experiments where evacuation (or similar conditions) are considered. Results for small room sizes and limited number of pedestrians show that the crowd danger distribution over the space in front of the exit door has similar patterns to typical quantities used in the frame of pedestrian dynamics (density and flow) and symmetrical shapes are obtained. However, when larger scenarios are considered, then congestion map and crowd danger become unrelated from density and/or flow, showing that both quantities express different aspects of pedestrian motion.

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Published

27.03.2020

How to Cite

Feliciani, C., & Nishinari, K. (2020). Investigation of pedestrian evacuation scenarios through congestion level and crowd dang. Collective Dynamics, 5, 150–157. https://doi.org/10.17815/CD.2020.45

Issue

Section

Proceedings of Pedestrian and Evacuation Dynamics 2018