MINNEAPOLIS (AP) — A federal report says 3.1 percent of Minnesota drivers have admitted to falling asleep behind the wheel in the past 30 days.

That's better than the national average of 4.2 percent.

The analysis was reported this week by the Centers for Disease Control and Prevention. It was based on data from the National Highway Traffic Safety Administration, and involved surveys of 147,000 drivers in 19 states and the District of Columbia.

The traffic-safety agency says 1 in 40 fatal crashes nationwide involves a drowsy driver.

The CDC says tired drivers often try to combat fatigue by opening, cranking the air conditioner or turning up the radio. The CDC says those tactics generally don't help.

Copyright 2013 The Associated Press.