Oklahoma State Highway 270 1979, US-270 ran through Oklahoma City on surface streets. It left the city and ran through Choctaw concurrent with US-62. US-270 split away from US-62 in Harrah, and continued on to Shawnee on what is now SH-270. On March 5, 1979, US-270 was rerouted to run concurrent with Interstate 40 from south of Calumet in Canadian County through the Oklahoma City metro, exiting the Interstate onto a surface alignment in Shawnee. Presumably, SH-270 was commissioned the same date. The realignment of US-270, with SH-270 on the old alignment between Harrah and Shawnee, appears on the 1979 state map. SH-270 followed
Oklahoma State Highway 5 of the H.E. Bailey Turnpike). Five miles (8 km) east of where this three-route concurrency breaks up, SH-5 turns south in Walters, with the mainline being taken over by State Highway 53. SH-5 heads east again toward Temple, where it has a brief concurrency with State Highway 65, and then turns southeast to pass through Hastings before ending at US-70 in Waurika. SH-5 has three lettered spur routes. Oklahoma State Highway 5 State Highway 5 (SH-5 or OK-5) is the name assigned to two distinct state highways in the U.S state of Oklahoma. One runs for through extreme southwestern Oklahoma,