Indiana State Route 241 runs east-west across southern Knox County. tghis provides a by-pass from the Vincennes Metro for traffic NB on U.S. Rt. 41 to EB U.S. Rt. 50 or 150. IN St Rt 241 passes through the following towns in Knox County. Decker Iona Ridgeville IN St Rt 241 is multi-plexed in Knox County. Indiana State Route 61, near Monroe City. IN St Rt 241 intersects the following highways in Knox County. U.S. Rt. 41, near Decker. Indiana State Route 61, near Monroe City. U.S. Rt. 150, near Maysville. U.S. Rt. 50, near Maysville.