According to a new report from the Centers for Disease Control and Prevention, more than 7,000 fatal car crashes might involve drowsy driving each year.
Researchers looked at survey data filled out by more than 90,000 Americans. They focused on questions about sleep patterns and driving habits.
They found four percent had fallen asleep while driving within the past month.
Drowsy drivers have slower reaction times and pay less attention to surroundings.
Researchers found men, young drivers, binge drinkers and people who don’t wear seatbelts were most likely to drive while sleepy.
Researchers say the best way to prevent drowsy driving is to get enough sleep and avoid alcohol before hitting the road.
According to the report, tactics like turning the radio up, rolling the windows down and turning up the air condition do not work.