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 112 as gravel through Cameron, ending at US-271/SH-9 in what is now Pocola (the town is not shown on contemporary maps). On October 5, 1959, the highway was straightened between Cameron and US-271. By this time, the highway was entirely paved. Further straightening between Cameron and Rock Island occurred on June 1, 1970. The most major change in SH-112's history came on February 5, 1973, when the highway was extended to Arkoma. One further straightening occurred in the Cameron vicinity on June 27, 1982. No further changes have occurred since then. Oklahoma State Highway 112 State Highway 112 is a 24.6