In The Ongoing Effort Tor Reduce The Problem Of Driving Under The Influence And Related Crashes, The Kingsport Police Department Will Be Conducting A D.U.I. Sobriety Checkpoint Later Today. Tennessee D.U.I. Laws Apply Not Just To Alcohol, But To Any Substance That Impairs, Including Illegal Drugs, Over-The-Counter Medications, As Well As Prescribed Drugs. The Sobriety Checkpoint Will Be From 11 P.M. Tonight Until 1 A.M.