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 17A of the highway belongs to Garvin County, while land south of the highway falls into Murray County. The route ends at an intersection with US-77 south of Wynnewood. SH-17A first appeared on the 1983 official state map. The highway's route was identical to the present-day route; no changes have occurred since its commissioning. Oklahoma State Highway 17A State Highway 17A (SH-17A) is a long long state highway in south-central Oklahoma. It connects Interstate 35 (I-35) to U.S. Route 77 (US-77) near Wynnewood. It does not connect to its implied parent, State Highway 17. SH-17A was established around 1982, and has