In 1937, the highway was extended on both ends, on the west to its current western terminus at U.S. Route 127 west of Chickasaw, and on the east to its current eastern endpoint at State Route 273 northeast of Rushsylvania.
In 1937, the highway was lengthened on both sides: from its original western point to its current location near U.S. Route 127 west of Chickasaw, and from its initial eastern position to its present endpoint at State Route 273 northeast of Rushsylvania.