Police begin their stepped-up drunk driver enforcement period today.

The Fourth of July crackdown will involve nearly 150 agencies in 26 counties, from the Upper Peninsula to metro Detroit. Grant-funded counties are: Allegan, Berrien, Calhoun, Chippewa, Delta, Eaton, Genesee, Grand Traverse, Houghton, Ingham, Jackson, Kalamazoo, Kent, Livingston, Macomb, Marquette, Monroe, Muskegon, Oakland, Ottawa, Saginaw, St. Clair, Van Buren, Washtenaw, Wayne and Wexford.

"The officers, deputies and troopers working the dedicated drunk driving patrols are truly major leaguers, the power hitters," said Michael L. Prince, director of the Michigan Office of Highway Safety Planning (OHSP). "They are highly trained to look after MVPs. And by that I mean Most Valuable People, our family and friends."

During last year's Fourth of July drunk driving crackdown, 115 motorists were arrested for drunk driving as a result of extra patrols. There were 19 traffic deaths over that holiday period; more than 40 percent of those deaths involved alcohol.