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Inefficient emergent oscillations in intersecting driven many-particle flows


Rui Jiang, Dirk Helbing, Pradyumn Kumar Shukla, Qing-Song Wu



Veröffentlicht: 2006

Journal: Physica A: Statistical Mechanics and its Applications,
Nummer: 2
Seiten: 567-574

Volume: 368

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Kurzfassung
Oscillatory flow patterns have been observed in many different driven many-particle systems. It seems reasonable to assume that the emergent oscillations in opposing flows are due to or related to an increased efficiency (throughput). In this contribution, however, we will study intersecting pedestrian and vehicle flows as an example for inefficient emergent oscillations. In the coupled vehicle–pedestrian delay problem, oscillating pedestrian and vehicle flows form when pedestrians cross the street with a small time gap to approaching cars, while both pedestrians and vehicles benefit, when they keep some overcritical time gap. That is, when the safety time gap of pedestrians is increased, the average delay time of pedestrians decreases and the vehicle flow goes up. This may be interpreted as a slower-is-faster effect. The underlying mechanism of this effect is explained.



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