Experimental Study of Pedestrian Flow Through a T-Junction

Jun Zhang (), W. Klingsch (), A. Schadschneider () and A. Seyfried ()
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Jun Zhang: Wuppertal University, Institute for Building Material Technology and Fire Safety Science
W. Klingsch: Wuppertal University, Institute for Building Material Technology and Fire Safety Science
A. Schadschneider: Universität zu Köln, Institut für Theoretische Physik
A. Seyfried: Bergische Universität Wuppertal, Computer Simulation for Fire Safety and Pedestrian Traffic

A chapter in Traffic and Granular Flow '11, 2013, pp 241-249 from Springer

Abstract: Abstract In this study, series of experiments under laboratory conditions were carried out to investigate pedestrian flow through a T-junction, i.e., two branches merging into the main stream. The whole duration of the experiments was recorded by video cameras and the trajectories of each pedestrian were extracted using the software Petrack from these videos. The Voronoi method is used to resolve the fine structure of the fundamental diagram and spatial dependence of the measured quantities from trajectories. In our study, only the data in the stationary state are used by analyzing the time series of density and velocity. The density, velocity and specific flow profiles are obtained by refining the size of the measurement area (here 10 × 10 cm are adopted). With such a high resolution, the spatial distribution of density, velocity and specific flow can be obtained separately and the regions with higher value can be observed intuitively. Finally, the fundamental diagrams of T-junction flow is compared in three different locations. It is shown that the fundamental diagrams of the two branches match well. However, the velocities in front of the merging are significantly lower than that in the main stream at the same densities. After the merging, the specific flow increases with the density ρ till 2. 5 m−2. While in the branches, the specific flow is almost independent of the density between ρ = 1. 5 and 3. 5 m−2.

Keywords: Pedestrian Flow; Fundamental Diagram; Specific Flow Profile; Voronoi Method; Merging Branches (search for similar items in EconPapers)
Date: 2013
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Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-3-642-39669-4_23

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DOI: 10.1007/978-3-642-39669-4_23

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