Sleepiness is just as risky to a driver as is drinking and driving. Bring sleepy is dangerous to the driver and to the other people driving, biking or walking on the road. Just like alcohol, being sleepy slows the driver’s reaction time, decreases one’ awareness of one’s surroundings, increases the risk of having an accident, and impairs one’s judgment.
Investigators find it impossible to prove with certainty that an accident was caused by sleepy driving, especially in a fatality; however, there are several clues to look for at the scene of the crash that can tell the investigators that sleep was a factor. For example, if only one vehicle was involved, if the injuries are fatal or if there is suspicious lack of evasive maneuvers or skid marks.