Oklahoma State Highway 152 SH-4. In Oklahoma County, it heads northeast to connect to the Airport Road freeway, which provides access to Will Rogers World Airport, the main airport for Oklahoma City and most of central Oklahoma. SH-152 then ends at Interstate 44. The first addition of any part of what is now SH-152 to the state highway system occurred between May 1, 1926 and November 1, 1927. Sometime between these dates, State Highway 41 was commissioned to run between US-66 in Sayre and SH-2 (now US-81) near Minco. SH-41 was extended east to Oklahoma City sometime between August 1933 and October 1935. SH-41's
Oklahoma State Highway 56 Oklahoma State Highway 56 State Highway 56 (abbreviated SH-56 or OK-56) is a state highway in the U.S. state of Oklahoma. The road serves Seminole County, Okfuskee County, and Okmulgee Counties in central and east-central Oklahoma. In Seminole County, it is also designated as the Seminole Nation Highway in honor of the contributions the Seminole Nation has made to the state of Oklahoma. SH-56 begins at an intersection with US-377 four miles (6 km) east of Konawa, and extends to US-75 in Okmulgee. The highway's total length is . SH-56 was first added to the state highway system in 1929.