Uni- and bi-directional pedestrian flow in the view-limited condition: Experiments and modeling |
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| Institution: | 1. School of Engineering Science, University of Science and Technology of China, Hefei 230026, PR China;2. School of Mathematics and Computational Science, Anqing Teachers College, Anqing 246133, PR China;3. MOE Key Laboratory for Urban Transportation Complex Systems Theory and Technology, Beijing Jiaotong University, Beijing 100044, PR China;1. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230027, China;2. Research Center for Crisis & Hazard Management, Wuhan University of Technology, Wuhan 430070, China;3. Shanghai Key Laboratory of Engineering Structure Safety, Shanghai Research Institute of Building Science, Shanghai 200032, China;1. Research Center of Complex Systems Science, University of Shanghai for Science and Technology, Shanghai 200093, PR China;2. Department of Modern Physics, University of Science and Technology of China, Hefei 230026, PR China;1. Institute of Transport Studies, Monash University, Melbourne 3800, Australia;2. ARRB Group Ltd, Melbourne 3133, Australia;1. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230027, China;2. Research Center for Crisis & Hazard Management, Wuhan University of Technology, Wuhan 430070, China;3. Shanghai Key Laboratory of Engineering Structure Safety, Shanghai Research Institute of Building Science, Shanghai 200032, China;1. State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing 100044, China;2. School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, China |
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| Abstract: | In this paper, the impact of vision on the uni- and bi-directional flow has been investigated via experiment and modeling. In the experiments, pedestrians are asked to walk clockwise/anti-clockwise in a ring-shaped corridor under view-limited condition and normal view condition. As expected, the flow rate under the view-limited condition decreases comparing with that under the normal view condition, no matter in uni- or bi-directional flow. In bidirectional flow, pedestrians segregate into two opposite moving streams very quickly under the normal view condition, and clockwise/anti-clockwise walking pedestrians are always in the inner/outer ring due to right-walking preference. In the first set of experiment, spontaneous lane formation has not occurred under the view-limited condition. Pedestrian flow does not evolve into stationary state. Local congestion occurs and dissipates from time to time. However, in the later sets of experiments, spontaneous lane formation has re-occurred. This is because participants learned from the experience and adapted right-walking preference to avoid collision. To model the flow dynamics, an improved force-based model has been proposed. The driving force has been modified. The right-walking preference has been taken into account. The fact that pedestrians cannot judge the moving direction accurately under limited-view condition has been considered. Simulation results are in good agreement with the experimental ones. |
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| Keywords: | Unidirectional flow Bidirectional flow Lane formation Fundamental diagram View-limited condition Force-based model |
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