Driver fatigue is a factor in many thousands of road traffic accidents worldwide. Human beings need sleep! Sleep is not a matter of choice. It is essential and inevitable. The longer a person remains awake or suffers from reduced or interrupted sleep, the greater the need to fall asleep and the more difficult it will be to resist falling asleep. Eventually sleep will overcome the strongest efforts and intentions to stay awake. A lack of sleep is as dangerous as alcohol and will cause slower reactions, reduced vigilance, alertness and concentration. It will also affect our decision making and information processing skills.