More than one in four drivers (28 percent) reported being so tired they had a hard time keeping their eyes open while driving in the past month, according to new research by the AAA Foundation for Traffic Safety. Motorists ages 19-24 were the most likely to report driving dangerously drowsy at 33 percent, while the oldest drivers (ages 75+) and the youngest (ages 16-18) were the least likely to report having done so in the previous month at 22 percent each.

AAA is highlighting the risks of drowsy driving in support of the National Sleep Foundation’s Drowsy Driving Prevention Week, which runs November 3-10.

"Drowsy driving remains a significant threat to the motoring public, with many drivers underestimating the problem of driving while extremely tired, and overestimating their ability to deal with it," says Peter Kissinger, President and CEO of the AAA Foundation for Traffic Safety. "Driving while tired is dangerous because it slows reaction time, impairs vision and causes lapses in judgment, similar to driving drunk. We know that people can’t reliably predict when they are going to fall asleep, and a very fatigued driver may fall asleep for several seconds without even realizing it."

The study finds that 95 percent of drivers believe it is somewhat or completely unacceptable to drive when they are so tired it is difficult to keep their eyes open. More than eight in ten (83 percent) believe that drowsy drivers pose a somewhat or very serious threat to their personal safety.

"Many of us don’t get enough sleep and become worn out from all of our work and family obligations. But we tend to downplay our fatigue and stay behind the wheel, even when we should stop for a rest," says Marie Dodds, Public Affairs Director for AAA Oregon/Idaho. "We should consider the dangers whenever we attempt to push our driving to the limits. We can protect ourselves and everyone else on the road by recognizing the simple signs of fatigue."

An estimated 17 percent of fatal crashes, 13 percent of crashes resulting in hospitalization, and seven percent of all crashes requiring a tow involve a drowsy driver, according to a 2010 study by the AAA Foundation for Traffic Safety.

Some warnings signs that may signify drowsiness while driving are:

*The inability to recall the last few miles traveled;

*Having disconnected or wandering thoughts;

*Having difficulty focusing or keeping your eyes open;

*Feeling as though your head is very heavy;

*Drifting out of your driving lane, perhaps driving on the rumble strips;

*Yawning repeatedly;

*Accidentally tailgating other vehicles;

*Missing traffic signs.

AAA urges you to stop driving and find a safe place to pull over if experiencing any of the drowsy driving symptoms. To remain alert and be safer behind the wheel, AAA suggests:

*Get plenty of sleep (at least seven hours), especially the night before a long drive;

*Drive at times when you are normally awake;

*Schedule a break every two hours or every 100 miles;

*Avoid heavy foods;

*Travel with an alert passenger and take turns driving;

*Avoid medications that cause drowsiness or other impairment;

*Consult with a sleep specialist or other medical professional if you have trouble getting enough rest or are chronically fatigued.

The AAA Foundation for Traffic Safety collected the data as part of the 2013 Traffic Safety Culture Index. The data reported here are from the sample of 2,325 licensed drivers, ages 16 and older, who reported driving in the past 30 days. Participants were surveyed using a web-enabled probability-based panel representative of the U.S. population.

For more information about drowsy driving and Drowsy Driving Prevention Week (Nov. 3-10), visit the National Sleep Foundation’s drowsy driving website at <>