Notwithstanding any previous designation, the department shall designate United States highway 85 from the South Dakota border to the junction of United States highway 2 and United States highway 2 from the Montana border to the junction of United States highway 85 as the Theodore Roosevelt expressway and at a minimum shall place signs along the highway designating that name and may use any appropriate signs donated to the department.
N.D.C.C. § 24-01-54