Prosecutors and police agencies in southern Middle Tennessee say they will use special grant money to crack down on drunk driving violations. The 31st judicial district that includes Warren and Van Buren counties will use some $204,000 in new money for the effort. Coffee County’s 14th judicial district has been handed $160,000 for the stepped up enforcement effort. Prosecutors say the money will be used to clear DUI case backlogs and strengthen charges against DUI suspects who refuse blood alcohol tests. Manchester and Tullahoma police will use $30,000 for enforcement. Police agencies in Franklin County will spend some $60,000. Grundy County will pick up $25,000 to combat impaired drivers. Statewide some 376 law enforcement agencies will spend nearly $18 million for added DUI enforcement.