Annotated Literature Review Relating to Proposed Revisions to the Hours-of-Service Regulation for Commercial Motor Vehicle Drivers

NHTSA · 1999 · ROSA P / United States. Department of Transportation. Vehicle and Operations Division, Office of Research and Standards

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Summary

This annotated literature review synthesizes over 100 scientific studies to inform proposed revisions to the Hours-of-Service regulations for commercial motor vehicle drivers. The document examines the relationship between operator fatigue, sleep deprivation, and highway safety outcomes, addressing topics such as crash contributions, alertness countermeasures, and regulatory compliance. It categorizes drivers into five operational types based on driving patterns and schedule regularity to better align regulations with physiological needs. The review highlights that irregular duty cycles and insufficient off-duty time detrimentally affect alertness and performance, often disrupting circadian rhythms. It concludes that revised regulations should ensure adequate off-duty periods within a 24-hour cycle to allow for restorative sleep and mitigate fatigue-related risks.

Key finding

Irregular duty cycles and insufficient off-duty time significantly impair driver alertness and performance by disrupting circadian rhythms and limiting opportunities for restorative sleep.

Methodology

review

Sample size: 100

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