United States Department of Transportation
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Edition:Final Report; July 1991-September 1995
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Abstract:This report summarizes a program of research to develop methods, data, and guidelines to conduct heavy vehicle driver-oriented workload assessments of new, high-technology, in-cab devices. Many such devices are being developed and implemented in heavy trucks and cars. Examples include navigation systems, text message display systems, and voice communications systems, to name a few. The objective of this research was the development of methods to assess the degree to which in-cab device use competes with the primary task of safely controlling the vehicle at all times. The following seven tasks, conducted throughout this program, are summarized: reviewing task analysis data and protocols literature; defining standard heavy vehicle configuration and tasks; collecting original task analysis data; reviewing workload measures and related research; developing a workload measurement protocol document; collecting baseline data of workload measures; and evaluating two high-technology systems using the developed protocols. Presented for each task is a summary of the objectives, approach, and key results highlights. From this research, tentative heavy vehicle workload assessment measures and methods were recommended and a protocol document was prepared.
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