Depending on which piece of research you read between 20 and 40% of all accidents on the roads are attributable to driver fatigue. Insufficient sleep, poor individual choices, a simple adherence to ‘hours of service’ legislation, a lack of education and awareness, no understanding of the extent of the problem as well as toxic company cultures all contribute to this serious problem. In this paper we review the extent, costs and examples of drowsy driving. We hope you enjoy the paper.