Oklahoma State Highway 4 Oklahoma State Highway 4 State Highway 4, abbreviated as SH-4 or OK-4, is a designation for two distinct highways maintained by the U.S. state of Oklahoma. One of them serves as an important route through the suburbs west of Oklahoma City, while the other connects US-259 to the Arkansas state line west of Cove, Arkansas. SH-4 has no lettered spur routes. The two SH-4s were never connected. The Central Oklahoma highway was established in 1941 and gradually extended to its present extent between then and 2003. The Eastern Oklahoma highway was originally numbered SH-21, and was renumbered to SH-4 in
Oklahoma State Highway 171 comes to an end at US-56. The route of the present-day SH-171 was first shown as a state highway on the 1975 official state map, implying its creation in 1974. On this edition of the map only, it is shown as State Highway 170. By 1976, it was shown as SH-171. The route has always been paved, and follows the same routing that it did in 1974. Oklahoma State Highway 171 State Highway 171, abbreviated as SH-171, is a state highway in Cimarron County, Oklahoma, in the Oklahoma Panhandle. It runs for north and south through the eastern part of