About one-third of designated drivers have at least one drink while carrying the title.

The terms “designated driver” and “designated driving” (commonly known as DD) refer to the selection of a person who remains sober as the responsible driver of a vehicle whilst others have been allowed to drink alcoholic beverages.

About 40 percent of designated drivers end up having at least one drink, and nearly 20 percent drink enough to impair their ability to drive.

Source: washingtonpost.com/bl…