United States Department of Transportation
i
Effects of Loading and Unloading Cargo on Commercial Truck Driver Alertness and Performance
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2001-05-01
[PDF-11.75 MB]
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Edition:Final Report July 1996 - September 2000
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Abstract:This report describes Phase I of a two-phased assessment of the effects of loading and unloading cargo on truck drivers alertness and performance. The report, which documents work done on three Phase I tasks, contains: a) a comprehensive behavioral and physiological sciences literature review regarding sustained performance and operator fatigue, with a focus on the effects of expending physical work energy on operator fatigue. b) a characterization of commercial motor vehicle industry procedures, methods and practices concerning drivers who load and / or unload their vehicles (trucks/buses). This was accomplished by examining trucking industry trade literature on loading/unloading procedural matters, then conducting a questionnaire survey of over 300 truck drivers, followed by sixteen focus group interviews to understand driver loading/unloading requirements across the country, and c) a behavioral task analysis assessment of various driver loading and unloading scenarios in four cargo commodity groups: moving household furniture and goods, tank truck carrier operations, fast food supply delivery, and beverage delivery operations Phase II of the overall study involved a truck driver simulator-based experiment to assess the effects of physical activity on loading /unloading cargo on subsequent driver alertness and driving performance. The Phase II experiment is described fully in a companion report, No. FHWA-MC-99-140, Effects of Operating Practices on Commercial Driver Alertness.
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