The current route was designated on its current path on November 25, 1975 to replace US 81 and US 287, which were routed onto a new built upgraded parallel path, and State Highway 114, which was moved to a different routing in the state.
The current route was established on its present path on November 25, 1975, to replace US 81 and US 287, which were rerouted onto a new highway, and State Highway 114 was moved to a different route in the state.