Abstract
Chronic excessive sleepiness and accidents caused by sleep-related fatigue are major issues for Australian heavy vehicle drivers. This report examines the importance of sleep-related fatigue and its role in heavy vehicle accidents. Unlike many other road safety accident factors, sleepiness is identifiable, predictable, and preventable. This report presents the results of the measurement of chronic excessive sleepiness in a large sample of heavy vehicle drivers in Australia and the results of a concurrent medical examination by doctors. (Author/publisher)