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UPRR Fatigue Conference Studies of Passenger Work Rest Schedules

UPRR Fatigue Conference Studies of Passenger Work Rest Schedules. Patrick Sherry, Ph.D. University of Denver Transportation Institute. Overview. Typical passenger schedules FAST FAID What to do with outliers Next steps Tool box. Perspective.

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UPRR Fatigue Conference Studies of Passenger Work Rest Schedules

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  1. UPRR Fatigue ConferenceStudies of Passenger Work Rest Schedules Patrick Sherry, Ph.D. University of Denver Transportation Institute

  2. Overview • Typical passenger schedules • FAST • FAID • What to do with outliers • Next steps • Tool box

  3. Perspective the number of hours worked per week (over 40) and the number of hours worked per day (over 8) were positively associated with an increasing risk of injury (per 100 worker-years).

  4. Incidence rate Increasedby hours worked per week

  5. Septa – 6am to 6pm7 hr sleep – no naps

  6. Septa – 6am to 6pm 5 hr sleep – no naps

  7. Septa – 5 hr sleep – 1 hr nap

  8. MNR 5am – 7pm w IR 5hr slp – 6 days

  9. MNR 5am – 7pm w IR 6hr slp – 6 days

  10. MNR 5am – 7pm w IR 6hr slp – 8 days

  11. MNR 5am – 7pm w IR 6hr slp – No IR

  12. MNR 5am – 7pm w IR 6hr slp – IR Nap

  13. MNR 5am – 7pm w IR 6hr slp – IR Nap

  14. Most schedules range from 5 am to 7pm • Not all schedules have an IR • Even if no nap taken during the IR period effectiveness ok • Continuous 14 hr ok • Effects of naps positive • Evening starts more problematic

  15. Majority of work schedules are during the day • Schedules starting later in the day extending into the early morning hours have more risk • Consider various countermeasures to address risk

  16. Hazard Identification • Development of Countermeasures • Tool Box

  17. MNR A155 1800-200am

  18. MNR A100 2030-430

  19. MNR A135 2030-430am

  20. MNR A135 with naps

  21. A135 more naps

  22. MNR A135 with naps

  23. A135 more naps

  24. Individual Differences

  25. Two Different Ways of Looking at the Data

  26. Issues • Confidence Intervals • Individual differences • Varying assumptions • Effects of naps • Effects of caffeine • Scientific evidence not limited to models • Accuracy of models only 50 rms residual • Greater chance of accidents not same as actual risk. • What is the risk?

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