Driver fatigue is a major factor in many road accidents and can be as dangerous as driving under the influence of alcohol. It impairs reaction time, vigilance, alertness and decision making. Most humans need around 8 hours of sleep per day to function normally, and taking less than 5 hours of sleep the previous night can severely impair performance. Pulling over and taking a short 10-15 minute nap can provide a reprieve of around 1 hour, but the only effective remedy is to get good quality sleep. Signs of driver fatigue include yawning, tired eyes, boredom, and restlessness. If feeling sleepy, drivers should pull over at a safe place and rest.