 Initially, the route consisted of three disconnected segments of highway; the southern segment corresponded with present-day SH-6 southwest of Altus, the central segment extended from the current southern terminus of the route to what is now known as Dill City, and the northern segment began west of Custer City and extended north to Medford.The northernmost section was redesignated as several other highways, primarily SH-58.The other two segments of highway were connected in 1962, and the current termini were established in 1987.