The Many Roles of the Relaxation time Parameter in Force based Models of Pedestrian Dynamics

Journal article (2014)
Department
Transport & Planning (CEG) (TU Delft)
Copyright: This is an open access article under the CC BY-NC-ND license
DOI: https://doi.org/doi:10.1016/j.trpro.2014.09.057
Calibration Relaxation time Pedestrian simulation Force based models Social force model
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Published Date

02-10-2014

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Source:

Transportation Research Procedia, 2, 2014; The Conference on Pedestrian and Evacuation Dynamics 2014 (PED 2014), 22-24 October 2014, Delft, The Netherlands

ISSN:

2352-1465

Faculty

Civil Engineering and Geosciences

Department

Transport & Planning

Abstract

In force based models of pedestrian traffic, the relaxation time, ?, is related to the time it takes a pedestrian to adapt its motion to its preferences. An example of this is linear acceleration, but ? is also connected to how the agent adjusts to spatial variations in its preferred velocity, and affects evasive maneuvers. These many roles of ? may be a problem when calibrating force based models. We compare linear acceleration, to new data on, and simulations of, turning movements. The results indicate that the models predict drifting of a magnitude that is not supported by the data.

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