Oklahoma State Route 199 runs east-west in East-Central Carter County. This highway runs from Ardmore to Johnston County, near Mannsville. OK St Rt 199 passes through the following towns in Carter County. Ardmore Dickson OK St Rt 199 is multi-plexed in Carter County. U.S. Rt. 177, from Dickson to the Carter/Johnston County Line. OK St Rt 199 is multi-plexed in Carter County. Interstate 35, at Ardmore. U.S. Rt. 70, at Ardmore. U.S. Rt. 77, at Ardmore.
Oklahoma State Route 142, at Ardmore. U.S. Rt. 177, at Dickson.
