Enviado em 02/12/2011
This VISWALK simulation is a variant of thishttp://youtu.be/QkVOjbRq-Io model with more challenging conditions: there are now 4 input flows, 4 destinations and a larger demand in total.
Pedestrians are color-coded by input area. The minor difference in color shows their destination area on the other side of the corridor. Again this means that some of the streams have to cross, the lanes are dissolved and need to reform in time to avoid a dead lock.
Historic crowd disasters show that a crowd in such a counterflow situation is not always able to avoid a deadlock for arbitrary demands. The conditions when a deadlock occurs do not only depend on the inflow from both sides but also on the spatial extent of the bottleneck area and if this area is visible by the inflowing crowds. This implies that it is very difficult, if not impossible, to calibrate the parameters to produce a bottleneck under the correct inflow volumes. Typically this is not a problem as the interest is mainly in situations when conditions become clearly uncomfortable - which is still far from a deadlock.
Pedestrians are color-coded by input area. The minor difference in color shows their destination area on the other side of the corridor. Again this means that some of the streams have to cross, the lanes are dissolved and need to reform in time to avoid a dead lock.
Historic crowd disasters show that a crowd in such a counterflow situation is not always able to avoid a deadlock for arbitrary demands. The conditions when a deadlock occurs do not only depend on the inflow from both sides but also on the spatial extent of the bottleneck area and if this area is visible by the inflowing crowds. This implies that it is very difficult, if not impossible, to calibrate the parameters to produce a bottleneck under the correct inflow volumes. Typically this is not a problem as the interest is mainly in situations when conditions become clearly uncomfortable - which is still far from a deadlock.
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