There will roadblocks in Warren County on Friday night with troopers looking to sniff out drunk drivers.“Impaired driving is a serious crime that kills more than 16,000 people and injures over 305,000 others every year in the United States,” said Capt. Robert Christian of the Tennessee Highway Patrol, which will be spearheading the sobriety checkpoints June 30.The captain said troopers will be actively looking for people who climb behind the wheel after drinking. “Troopers will evaluate drivers for signs of alcohol impairment and will target those who operate a vehicle while impaired.”While drunk driving is the point of the roadblocks, officers will be writing tickets for other violations that are caught within the checkpoints such as driving without a license, light violations and other moving and mechanical issues. The exact location of the roadblocks, which often are moved a few times during the course of the evening, have not been given.