 SR 194 was decommissioned in 1927 leaving the route that later became SR 500 as a county road.The commissioning of SR 500 took place in 1937, and replaced a county road west of Payne, while east of Payne it replaced the former route of SR 194.The highway had a gravel surface between the Indiana state line and SR 49, while between SR 49 and its eastern terminus at SR 111 it was paved.