0194 Sleep Quantity And Quality, Pvt-b Performance, And Subjective Sleepiness, Fatigue, And Stress In Commercial Motor Vehicle (cmv) Drivers: On-duty Days Vs. Restart (off-duty) Days

• Published in: Sleep (New York, N.Y.) N.Y.), 2019-04, Vol.42 (Supplement_1), p.A79-A80
• Main Authors: Dinges, David F, Maislin, Greg, Hanowski, Richard J, Mollicone, Daniel, Hickman, Jeffrey S, Maislin, David, Kan, Kevin, Hammond, Rebecca, Soccolich, Susan A, Moeller, Devon, Trantalange, Michael, Cordoza, Makayla, Kaizi-Lutu, Marc
• Format: Article
• Language: English
• Subjects: Fatigue; Sleep
• ISSN: 0161-8105; 1550-9109
• DOI: 10.1093/sleep/zsz067.193

Introduction An observational study of CMV drivers was undertaken to assess the operational, safety, health, and fatigue impacts of the restart provisions in Sections 395.3(c) and 395.3(d) of Title 49, Code of Federal Regulations. Methods N=235 drivers (224 males, 20-69y) participated in an observational study for up to 5 months duration. All drivers held a valid CMV driver’s license, worked >60 hours/week, completed drives during the day and night, and made use of the restart provisions. They were recruited to reflect diverse types of vehicles and operational distances. They reported either driving mostly during the day (10.2%), mostly during the night (14.9%), or a combination of day and night (74.9%). They were monitored via electronic devices to track driving (including safety critical events) and work hours. Smartphone apps were used to track their behavioral alertness on the Brief Psychomotor Vigilance Test (PVT-B), and their ratings of fatigue, sleepiness, stress, and sleep quality. Statistical comparisons were performed using linear and non-linear mixed-effects modeling. Results A total of 26,964 days of data were acquired, including >79,000 PVT-B tests. During on-duty days, drivers slept an average of 6.6h/day, compared to 8.7h/day during restart (off-duty) days (p