According to the Centers for Disease Control and Prevention, the Governors Highway Safety Association released a report that puts one in four drivers at risk of falling asleep at the wheel.

In a report that included research from the American Automobile Association, the National Transportation Safety Board revealed that an average of 328,000 drowsy driving crashes occur on U.S. roads annually.

Of those crashes, the report found that 109,000 caused injuries and 6,400 of those crashes led to death.

Experts say that drowsy driving is a sign of the times, in which Americans are working too hard, not taking breaks or relaxing, and never allowing their minds to shut down.  Here's more from abcnews.go.com.