Two out of every five drivers acknowledge having fallen asleep or briefly nodding off at the wheel at least once, according to a national survey.
Ten percent of drivers say they've done it in the last year, the AAA Foundation for Traffic Safety found in a poll of 2,000 drivers. Read more: http://www.sacbee.com/2010/11/09/3170065/aaa-survey-highlights-risks-from.html#ixzz14nws8UzZ