“…Specifically, variability in lateral lane position significantly increased when drivers had lowered alertness levels, consistent with previous studies using the AusEd driving simulator (Howard et al, 2007;Vakulin et al, 2007), on other driving simulator tasks (George, 2000;George, Boudreau, & Smiley, 1996;Lenne, Triggs, & Redman, 1998), and during on-road driving (Philip, et al, 2005;Ramaekers & O'Hanlon, 1994). Previous studies have also noted significant variations outside the prescribed speed range with sleep loss (Arnedt, Wilde, Munt, & MacLean, 2001;Lenne, Triggs, & Redman, 1998), consistent with the current study.…”