(1) There is established the highway patrol officer David Graham memorial highway on the existing U.S. highway 2 from the southern boundary of the city of Kalispell to the western boundary of the city of Columbia Falls.
(2) When existing road signs on the designated highway need replacement, the department shall provide appropriate markers to recognize the memorial designation of the highway.
(3) Maps that identify roadways in Montana must be updated to reflect the memorial designation in subsection (1) when the maps are updated.