Reaction times in single-file pedestrian flows with fixed or free density

Authors

  • Cécile Appert-Rolland Université Paris-Saclay, Laboratoire de Physique des 2 infinis Irène Joliot-Curie – IJCLab, UMR9012 – CNRS, Bât. 100, 15 rue Georges Clémenceau, 91405 Orsay cedex, France
  • Julien Pettré Université de Rennes, Institut de Recherche en Informatique et Systèmes Aléatoires – IRISA, INRIA du Centre de l’Université de Rennes, UMR6074 – INRIA / CNRS, 263 Avenue du général Leclerc 35042 Rennes Cedex, France

DOI:

https://doi.org/10.14311/APP.2026.57.0009

Keywords:

pedestrian dynamics, single-file experiments, reaction times, density constraint

Abstract

Single-file flows allow to scan longitudinal interactions. Here we report single-file experiments performed with prescribed or free density along a circular path. We propose an interpretation in terms of safety margin, comfort and reaction times, of the observed piece-wise linear speed-headway relation. In particular, for intermediate densities, a two-stage reaction process is proposed. This regime does not seem to be present when a collective decision about the circle radius has to be taken.

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Published

2026-06-19

Issue

Vol. 57 (2026): Pedestrian and Evacuation Dynamics 2025

Section

Articles

License

Copyright (c) 2026 Cécile Appert-Rolland, Julien Pettré

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

Appert-Rolland, C., & Pettré, J. (2026). Reaction times in single-file pedestrian flows with fixed or free density. Acta Polytechnica CTU Proceedings, 57, 9–15. https://doi.org/10.14311/APP.2026.57.0009