Abstract
Body rotation is a common behavior in pedestrian flow dynamics. In this paper, an improved least-effort model is proposed to reproduce this behavior and other pedestrian flow characteristics. In this model, the pedestrian chooses the velocity and angle of body rotation according to the minimum energy cost. The energy cost includes the caloric expenditure in the walking, collision loss and body rotation cost. In order to validate the accuracy of the model, an experiment is conducted to investigate the bypassing/crossing and body rotation behavior quantitatively. The pedestrian can choose to walk through the exit or pass by the wall next to the exit, in order to reach the target place. When the exit is narrow, the pedestrian prefers to pass by the short wall, but cross through the exit in long-wall cases. As the exit gets narrower, the rotation angle increases. In the multi-pedestrian simulation, the pedestrian can avoid collision in the narrow corridor by body rotation. The body rotation will also enhance flow efficiency at the narrow bottleneck.
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