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 19 Oklahoma State Highway 19 State Highway 19, abbreviated as SH-19, is a highway running through the southern part of the U.S. state of Oklahoma. It is signed east–west. SH-19 begins at an intersection with US-283 in Blair, Oklahoma. SH-19 heads east from Blair for 23 miles (37 km) without intersecting another highway before meeting U.S. Highway 183 north of Roosevelt. It continues eastward, sharing a 3-mile (4.8 km) section of road with State Highway 54 before splitting off to the east and briefly overlapping with SH-115 and State Highway 58. The next town Highway 19 encounters is Apache, north of