The Ohio State Highway Patrol, in conjunction with the Mount Vernon Police Department and the Knox County Sheriff’s Office, announced today that OVI checkpoints will be held from 8pm to 1am tonight on SR13/South Main Street and US36/Coshocton Avenue, in Knox County. Also an OVI checkpoint will be held from 8 P.M. to 10 P.M. tonight on County Road 330 west of U.S. 30 and east of Stetzer Road, in Crawford County.