Fatigue and Workload Management in Autonomous and Unmanned Vehicle Operation

[Speaker] Matthews, Gerald:1
1:University of Central Florida (United States of America)

Adverse impacts of fatigue on driver performance and safety may be amplified by vehicle automation. Simulator studies show that full automation rapidly induces a state of "passive fatigue" characterized by loss of task engagement. The fatigue state slows braking and steering responses following reversion to full manual control. Performance impairments reflect depletion of attentional resources and disruption of workload management. Fatigue may also increase the driver's vulnerability to distraction. However, distraction effects are complex; in some cases, use of in-car media may counter the development of fatigue in the automated vehicle. Fatigue also threatens operators of unmanned ground and aerial vehicles, in both military and civilian contexts. Recent simulation studies show that both cognitive overload and underload may provoke stress and fatigue in operators, as well as changes in trust in automation. Psychophysiological and subjective metrics may be used to track operator alertness and support efforts at fatigue mitigation.
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