U.S. Federal Route 77 runs north-south through Oklahoma County. This highway runs along the many expressways of the Oklahoma City Metro Area. This highway enters from Cleveland County on Interstate 35 and runs up to Interstate 44. U.S. Rt. 77 runs along the Broadway Extension to the city of Edmond and runs back to Interstate 35 on 2nd Street. U.S. Rt. 77 passes through the following towns in Oklahoma County. Oklahoma City Edmond U.S. Rt. 77 is multi-plexed in Oklahoma County. Interstate 35, from the Oklahoma/Cleveland County Line to near Lake Aluma. U.S. Rt. 62, at Oklahoma City. Interstate 40, at Oklahoma City. U.S. Rt. 270, at Oklahoma City. Interstate 44, at Oklahoma City.