DEARBORN (WWJ) – A new study finds that drowsy driving is far more dangerous than previously thought.

The most in-depth drowsy driving research ever conducted in the U.S. using footage of everyday drivers found that the percentage of crashes involving drowsiness is nearly eight times higher than federal estimates indicate, according to the AAA Foundation for Traffic Safety.

The difficulty in detecting drowsiness following a crash makes drowsy driving one of the most underreported traffic safety issues. The new research provides an unprecedented analysis of in-vehicle dashcam video from more than 700 crashes, confirming that the danger of drowsy driving soars above official estimates.

“Drowsy driving is a bigger traffic safety issue than federal estimates show,” Dr. David Yang, executive director for the AAA Foundation for Traffic Safety, said in a statement. “Drivers who don’t get enough sleep are putting everyone on the road at risk. By conducting an in-depth analysis using video of everyday drivers, we can now better assess if a driver was fatigued in the moments leading up to a crash.”

In the study, researchers examined video of drivers’ faces in the three minutes leading up to a crash. Using a scientific measure linking the percentage of time a person’s eyes are closed to their level of drowsiness, the researchers determined that 9.5 percent of all crashes and 10.8 percent of crashes resulting in significant property damage involved drowsiness. Federal estimates indicate drowsiness is a factor in only one to two percent of crashes.

The Centers for Disease Control and Prevention says that 35 percent of U.S. drivers sleep less than the recommended minimum of seven hours daily.

In a recent related AAA Foundation survey, nearly all drivers (96 percent) say they view drowsy driving as a serious threat to their safety and a completely unacceptable behavior. However, 29 percent admitted to driving when they were so tired they had a hard time keeping their eyes open at some point in the past month.

“Missing just two to three hours of sleep can more than quadruple your risk for a crash, which is the equivalent of driving drunk,” said AAA’s Dusan Hiltz.

Drivers should not rely on their bodies to provide warning signs for drowsiness and should instead prioritize getting at least seven hours of sleep before hitting the road.

“Don’t be fooled, the only antidote for drowsiness is sleep,” said Hiltz. “Short term tactics like drinking coffee, singing, rolling down the window will not work. Your body’s need for sleep will eventually override your brain’s attempts to stay awake.”

AAA recommends that drivers:

  • Travel at times of the day when they are normally awake
  • Avoid heavy foods
  • Avoid medications that cause drowsiness or other impairment
  • For longer trips, drivers should:
  • Schedule a break every two hours or every 100 miles
  • Travel with an alert passenger and take turns driving
  • Do not underestimate the power of a quick nap. Pulling into a rest stop and taking a quick catnap — at least 20 minutes and no more than 30 minutes of sleep– can help to keep you alert on the road.
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