Characterization of pedestrian contact interaction trajectories
ICCS (1)(2024)
摘要
A spreading process can be observed when a particular behavior, substance, or
disease spreads through a population over time in social and biological
systems. It is widely believed that contact interactions among individual
entities play an essential role in the spreading process. Although the contact
interactions are often influenced by geometrical conditions, little attention
has been paid to understand their effects especially on contact duration among
pedestrians. To examine how the pedestrian flow setups affect contact duration
distribution, we have analyzed trajectories of pedestrians in contact
interactions collected from pedestrian flow experiments of uni-, bi- and
multi-directional setups. Based on standardized maximal distance, we have
classified types of motions observed in the contact interactions. We have found
that almost all motion in the unidirectional flow setup can be characterized as
subdiffusive motion, suggesting that the empirically measured contact duration
tends to be longer than one estimated by ballistic motion assumption. However,
Brownian motion is more frequently observed from other flow setups, indicating
that the contact duration estimated by ballistic motion assumption shows good
agreement with the empirically measured one. Furthermore, when the difference
in relative speed distributions between the experimental data and ballistic
motion assumption is larger, more subdiffusive motions are observed. This study
also has practical implications. For instance, it highlights that geometrical
conditions yielding smaller difference in the relative speed distributions are
preferred when diseases can be transmitted through face-to-face interactions.
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关键词
interaction,contact
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