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Active inference as a unified model of collision avoidance behavior in human drivers

2 June 2025
J. Schumann
Johan Engstroem
Leif Johnson
Matthew O'Kelly
Joao Messias
Jens Kober
Arkady Zgonnikov
ArXiv (abs)PDFHTML
Main:14 Pages
8 Figures
1 Tables
Appendix:32 Pages
Abstract

Collision avoidance -- involving a rapid threat detection and quick execution of the appropriate evasive maneuver -- is a critical aspect of driving. However, existing models of human collision avoidance behavior are fragmented, focusing on specific scenarios or only describing certain aspects of the avoidance behavior, such as response times. This paper addresses these gaps by proposing a novel computational cognitive model of human collision avoidance behavior based on active inference. Active inference provides a unified approach to modeling human behavior: the minimization of free energy. Building on prior active inference work, our model incorporates established cognitive mechanisms such as evidence accumulation to simulate human responses in two distinct collision avoidance scenarios: front-to-rear lead vehicle braking and lateral incursion by an oncoming vehicle. We demonstrate that our model explains a wide range of previous empirical findings on human collision avoidance behavior. Specifically, the model closely reproduces both aggregate results from meta-analyses previously reported in the literature and detailed, scenario-specific effects observed in a recent driving simulator study, including response timing, maneuver selection, and execution. Our results highlight the potential of active inference as a unified framework for understanding and modeling human behavior in complex real-life driving tasks.

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@article{schumann2025_2506.02215,
  title={ Active inference as a unified model of collision avoidance behavior in human drivers },
  author={ Julian F. Schumann and Johan Engström and Leif Johnson and Matthew O'Kelly and Joao Messias and Jens Kober and Arkady Zgonnikov },
  journal={arXiv preprint arXiv:2506.02215},
  year={ 2025 }
}
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