Resolving uncertainty on the fly: Modeling adaptive driving behavior as active inference

• URL: http://arxiv.org/abs/2311.06417v1
• Date: Fri, 10 Nov 2023 22:40:41 GMT
• Title: Resolving uncertainty on the fly: Modeling adaptive driving behavior as active inference
• Authors: Johan Engstr\"om, Ran Wei, Anthony McDonald, Alfredo Garcia, Matt O'Kelly and Leif Johnson
• Abstract summary: Existing traffic psychology models of adaptive driving behavior either lack computational rigor or only address specific scenarios and/or behavioral phenomena. This paper proposes such a model based on active inference, a behavioral modeling framework originating in computational neuroscience. We show how human-like adaptive driving behavior emerges from the single principle of expected free energy minimization.
• Score: 6.935068505791817
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Understanding adaptive human driving behavior, in particular how drivers manage uncertainty, is of key importance for developing simulated human driver models that can be used in the evaluation and development of autonomous vehicles. However, existing traffic psychology models of adaptive driving behavior either lack computational rigor or only address specific scenarios and/or behavioral phenomena. While models developed in the fields of machine learning and robotics can effectively learn adaptive driving behavior from data, due to their black box nature, they offer little or no explanation of the mechanisms underlying the adaptive behavior. Thus, a generalizable, interpretable, computational model of adaptive human driving behavior is still lacking. This paper proposes such a model based on active inference, a behavioral modeling framework originating in computational neuroscience. The model offers a principled solution to how humans trade progress against caution through policy selection based on the single mandate to minimize expected free energy. This casts goal-seeking and information-seeking (uncertainty-resolving) behavior under a single objective function, allowing the model to seamlessly resolve uncertainty as a means to obtain its goals. We apply the model in two apparently disparate driving scenarios that require managing uncertainty, (1) driving past an occluding object and (2) visual time sharing between driving and a secondary task, and show how human-like adaptive driving behavior emerges from the single principle of expected free energy minimization.

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