Drowsy drivers: Study finds motorists asleep at the wheel

A 2005 survey from the National Sleep Foundation found 60 percent of drivers (168 million people) drove while drowsy in the past year and more than a third have fallen asleep behind the wheel. Four percent of these people, or 11 million drivers say they have either been in an accident or almost had an accident.
Drowsy drivers: Study finds motorists asleep at the wheel