“…The authors reported that mission start times had a major effect on the Marine's performance throughout the mission and that allowing only 3-4 hours of sleep resulted in a 30% degradation of performance during a second 20-hour continuous work episode compared to the baseline (Naitoh et al, 1987 At 24 hours of sustained wakefulness, the performance on the psychomotor test was equivalent to that of a rested person with a BAC of 0.10 percent, which is the legal limit for drunken driving in all of the U.S. states (Dawson & Reid, 1997). Moreover, sleepiness has been shown to exacerbate the sedating effects of alcohol so that even low levels of alcohol make the sleepy driver much more impaired and much more likely to fall asleep at the wheel (NHTSA, 1998;Roehrs et al, 1994;Dement and Vaughan, 1999 Belenky et al, 1987;Evans et al, 1991;Naitoh et al, 1987;McCallum et al, 2003;Folkard, 1990;Zarcone, 2000;De Valck & Cluydts, 2001;Dement & Vaughan, 1999;Babkoff & Krueger, 1992;Mitler & Aldrich, 2000;Ramsey & McGlohn, 1997;Roehrs & Roth, 2000;Moore-Ede & LeVert, 1998;Maas, 2001). …”