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 31 to the town of Kinta. At Kinta, SH-2 turns north, and SH-31 continues east, with a short dogleg concurrency with SH-82 at Lequire. Continuing on to the east, SH-31 serves as the southern terminus for SH-26 at McCurtain, then passes though Bokoshe before terminating at US-59/US-271, two miles (3 km) north of Panama. SH-31A is a spur connecting SH-31 with US-270/SH-1 and the town of Stuart in Pittsburg and Hughes counties. SH-31B is a spur connecting SH-31 and the town of Olney in Coal County. Oklahoma State Highway 31 State Highway 31 (abbreviated SH-31) is a state highway in Oklahoma.