Four sleep patterns were identified based on sleep duration, sleep start/end point in non-work period, and the percentage of sleep with reference to the duration of non-work period.
Shorter sleep duration, sleep in the early stage of non-work period, and less sleep between 1 to 5 a.m. were related to higher driving safety-critical event rate in subsequent work period.
Male truck drivers with fewer years of commercial vehicle driving experience and higher BMI were associated with increased driving risk.