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 145 Oklahoma State Highway 145 State Highway 145, abbreviated as SH-145 or OK-145, is a short, highway in Garvin County, Oklahoma. It connects Interstate 35 at its west end to US-77 in Paoli at its east end. It does not have any spur routes. State Highway 145 begins at Exit 79 along Interstate 35 in northern Garvin County. From this point, it heads east along Davis Avenue until it reaches the town of Paoli. The route ends at US-77 in the center of the town. "TO Interstate 35" signage is also present along westbound SH-145. State Highway 145 was added to