Main differences between the Wiedemann and the Helbing approaches
When pedestrians are modeled as a vehicle type according to Wiedemann model, they do not move around freely but along user-defined links in the network. The spatial characteristics of their trajectories are thus formed by the input data for the model and they do not result from the simulation. Only the time at which a pedestrian crosses a link at a particular point is calculated and a result formed.
In Helbing's model the pedestrians can move freely in two spatial dimensions. Their trajectories are thus not defined in advance, but are calculated by the model. Therefore this approach for pedestrian simulation is more flexible, detailed and realistic.
However, there are situations, in which the essential elements of the dynamics are produced by the Wiedemann model. Examples are projects, where pedestrians have no role other than to cause interruptions to vehicular traffic at signalized intersections.
Options for pedestrian modeling in the Wiedemann model
The add-on module Viswalk is not required.
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Levels of Interaction for pedestrians |
Elements of the Vissim network |
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Pedestrians using pedestrian crossings in the road network |
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PT passengers |
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Options for pedestrian modeling in the Helbing model
The add-on module Viswalk is necessary.
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Levels of Interaction for pedestrians |
Elements of the pedestrian module |
Elements of the Vissim network |
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Only pedestrian flows, for example
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pedestrians using pedestrian crossings in the road network |
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Pedestrians as PT passengers in the network |
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