While much attention is justifiably given to the problems of drunken driving and distracted driving, there is much less focus on drowsy driving. But individuals driving when extremely tired pose a serious problem that endangers more people than just the driver. More than one in four motorists (28%) reported being so tired in the last month they had a hard time keeping their eyes open behind the wheel, according to a new AAA Foundation for Traffic Safety study. Younger drivers most at risk Drivers between ages 19 and 24 are especially at risk because they most likely drive while fatigued, according to the foundation\u2019s 2013 Traffic Safety Culture Index on Drowsy Driving. These young adults usually are less alert while driving than other age groups because they tend to stay up late and rise early. On the other hand, the study disclosed that older drivers 75 years and up, and younger drivers between 16 and 18, were the least likely to drive while extremely fatigued. Older drivers tend to self-regulate their driving habits as their visual abilities change, while younger drivers are restricted from late-night drives because of graduated driver\u2019s license requirements. \u201cMany drivers simply underestimate the problem of driving while extremely tired and overestimate their ability to deal with it,\u201d said Lloyd P. Albert of AAA Southern New England. To support the National Sleep Foundation\u2019s Drowsy Driving Prevention Week campaign from Nov. 3 to 10, AAA released the study results, which highlight the risks of drowsy driving. Causes lapses in judgment Despite widespread disapproval of drowsy driving, it continues to be a significant threat to the motoring public because it slows reaction time, impairs vision and causes lapses in judgment \u2014 all actions that are similar to driving drunk. \u201cMany times a very fatigued driver may fall asleep for several seconds at the wheel without even realizing it,\u201d Albert pointed out. The foundation study also found that 95% of drivers believe it\u2019s somewhat or completely unacceptable to drive when they\u2019re so tired it is difficult to keep their eyes open, and 83% believe drowsy drivers pose a \u201csomewhat\u201d or \u201cvery serious\u201d threat to their personal safety. Warning signs Some warnings signs that may signify drowsiness while driving are: \u2014 The inability to recall the last few miles traveled. \u2014 Having disconnected or wandering thoughts. \u2014 Having difficulty focusing or keeping your eyes open. \u2014 Feeling as though your head is very heavy. \u2014 Drifting out of your driving lane, perhaps driving on the rumble strips. \u2014 Yawning repeatedly. \u2014 Accidentally tailgating other vehicles. \u2014 Missing traffic signs. Stop and rest If you find yourself driving while fatigued, AAA urges motorists to stop driving and find a safe place to pull over. It\u2019s always better to be safe than sorry. Remember, an unnecessary accident can negatively impact the lives of many people. People can die, people can be maimed, and the person at fault can face a lot of liability. For more information about drowsy driving, go to the National Sleep Foundation website at DrowsyDriving.org.