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 39 in 1968 or 1969, when SH-99 was rerouted to bypass Konawa, and SH-39 was extended east of town to end at the present junction. No changes have been made since. SH-39 once had one spur route, SH-39B. It ran along what is now May Avenue from SH-39's junction with SH-59 to SH-74B east of Cole, Oklahoma. Oklahoma State Highway 39 State Highway 39, abbreviated as SH-39, is a state highway in the U.S. state of Oklahoma. It is in length. It runs east–west through the central part of the state, beginning at unincorporated Tabler, east of Chickasha, and ending east