 It was extended to its current eastern terminus in 1937 but was extended further east to U.S. Route 42 in 1946.The route was truncated back to SR 48 by 1985 with the former section being renamed "Old State Route 122" and maintained by Warren County as CR 230.The route also used to continue west of the Indiana state line as Indiana State Road 122 west to its terminus at US 27 east of Abington, Indiana.