(1) There is established the Robert E. Ewing Jr. memorial highway composed of the existing Montana interstate 90 from reference marker 410 to reference marker 424, between Columbus and Park City.
(2) When existing road signs between reference marker 410 and reference marker 424 need replacement, the department shall erect road signs reflecting the memorial designation in subsection (1).
(3) Maps that identify roadways in Montana must reflect the memorial designation in subsection (1) when maps are updated or replaced.