Drowsy

A road sign warns drowsy drivers to take a break on long stretches. (credit: Torsten Blackwood/AFP/Getty Images)

CDC: 1 In 24 Admit Nodding Off While Driving

This could give you nightmares: 1 in 24 U.S. adults say they recently fell asleep while driving. And health officials behind the study think the number is probably higher.

01/04/2013