U.S. Federal Route 40 runs east-west across Clay County. This is a main highway in the northern portions of the county. U.S. Rt. 40 passes through the following towns in Clay County. Brazil
Knightsville Harmony
U.S. Rt. 40 is not multi-plexed in Clay County. U.S. Rt. 40 intersects the following highways in Clay County. Indiana State Route 340, at Brazil.
EB U.S. Rt. 40 at the Clay/Vigo County Line. EB U.S. Rt. 40 east of IN St Rt 340. EB U.S. Rt. 40 near Cloverland. EB U.S. Rt. 40 near County Road 225W. EB U.S. Rt. 40 near Turner. A guide marker on EB IN St Rt 340. EB U.S. Rt. 40 in Brazil. EB U.S. Rt. 40 near Leavitt Street in Brazil. EB U.S. Rt. 40 near Walnut Street in Brazil. EB U.S. Rt. 40 near Vandalia Street in Brazil. EB U.S. Rt. 40 west of Harmony. EB U.S. Rt. 40 east of Harmony.