U.S. Route 70 (abbreviated US-70) is a transcontinental U.S. highway extending from Globe, Arizona to Atlantic, North Carolina. Along the way, of its route passes through the state of Oklahoma. Entering the state south of Davidson, the highway serves Oklahoma's southern tier before exiting the state east of Broken Bow. It serves the cities of Ardmore, Durant, Hugo, and Idabel, as well as Tillman, Cotton, Jefferson, Carter, Marshall, Bryan, Choctaw, and McCurtain counties.