“…Novaco et al, 1990;Roberts et al, 2011;Schaeffer et al, 1988). This can be triggered by a range of stimuli, from traffic congestion (Schaeffer et al, 1988) and impedance (Gray and Lucas, 2001;Koslowsky and Krausz, 1993;Novaco et al, 1990) to the driving behavior of others (Rasmussen et al, 2000). Drivers' stress is marked by elevated blood pressure and neuroendocrine hormone levels (Hennessy and Wiesenthal, 1999) and has been shown to spill over into expressed hostility and obstructionism in the workplace (Hennessy, 2008).…”