Young people need less sleep. Wandering, disconnected thoughts are a warning sign of driver fatigue. Little green men in the middle of the road may mean the driver is too tired to drive. On a long trip, the driver should never take a break but try to arrive at the destination as quickly as possible. A microsleep lasts four or five seconds.
Stimulants are no substitute for sleep.
Drinks containing caffeine, such as coffee or cola, can help you feel more alert' lout the effects last only for a short time. Sleep is not voluntary. If you're drowsy, you can fall asleep and never even know it. You cannot tell how long you've been asleep. An open window or the radio has no lasting effect on a persons ability to stay awake.