Abstract
It is noted that falling asleep at the wheel is a leading cause of fatal expressway crashes, and that such crashes are increasing in number. Analysis of data indicates that falling asleep at the wheel may be second only to alcohol as a cause of crashes of one or two vehicles. Among the factors that contribute to falling asleep are the following: sleep deprivation; sleep disorders; body rhythms; and alcohol and street drugs. It is pointed out that driving induces sleep, and signs of driver fatigue are listed. Hints are given for safe driving, especially on long trips.