TRUCK Indiana State Route 9 is a bypass for trucks through Shelbyville. This runs along Interstate 74/U.S. Rt. 421 to Indiana State Route 44. Both ends connect with Indiana State Route 9. TRUCK IN St Rt 9 passes through the following town in Shelby County. Shelbyville TRUCK IN St Rt 9 is multi-plexed in Shelby County. Interstate 74, at Shelbyville. U.S. Rt. 421, at Shelbyville.