Driver Workload Metrics Project: Task 2 Final Report
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Abstract
November 2006 DOT HS 810 635 Driver Workload Metrics Project Task 2 Final Report CAMP Driver Workload Metrics IVI Light Vehicle Enabling Research Program This document is available to the public from the National Technical Information Service, Springfield, Virginia 22161 i Technical Report Documentation Page 1. Report No. 2. Government Accession No. 3. Recipient's Catalog No. DOT HS 810 635 4. Title and Subtitle 5. Report Date November 2006 Driver Workload Metrics Task 2 Final Rep
Summary
NHTSA-CAMP technical report (DOT HS 810 635, 2006) developing performance metrics and test procedures for visual, manual, and cognitive driver workload during in-vehicle task use. Data were collected across three venues (laboratory, instrumented interstate highway, test track) for 22 in-vehicle tasks plus a baseline driving condition under varied experimental conditions. Metrics were screened for repeatability, predictive validity, and discrimination of high vs. low workload. Provides a workload-evaluation toolkit including occlusion, peripheral detection task, Sternberg memory task, activity-time and static task-time tools.
Key finding
Task-induced workload is multidimensional and qualitatively different across modalities: visual-manual tasks and auditory-vocal tasks affect different driving-performance dimensions and to different magnitudes, so a single metric cannot characterize in-vehicle workload; a combined toolkit of lateral/longitudinal control, OED, eyeglance, occlusion, PDT, and Sternberg measures is required.
Methodology
Three-venue empirical program: laboratory, on-road interstate highway, and test track; 22 in-vehicle tasks plus baseline driving; mixed-design experiments across visual-manual and auditory-vocal task families; metrics evaluated for repeatability, predictive validity, and workload discrimination.
Sample size: N=57 (lab), N=108 (interstate), N=69 (test track)
Quality score: 5 / 5