A new study by the Centers for Disease Control Prevention is alarming, but is it enough to wake people up at the wheel?
The study found 4.2% of drivers fell asleep behind the wheel within the month before being surveyed.
People sleeping less than six hours a day were more likely to report sleeping at the wheel.
The National Highway Traffic Safety Administration says 2.5% of all fatal motor crashes involve drowsy driving.
State Patrol Trooper Chuck Elley says he's seen drowsy driving take several lives.
"People call in and tell us about, they think it's a drunk driver and in fact it's just a drowsy driver, with a lack of sleep. Which like I said, is just as bad as someone driving drunk."
The C.D.C recommends people get at least seven hours of sleep a day.