The portion of Interstate Highway 29 in Buchanan County bounded on the south by Frederick Boulevard and on the north by United States Highway 169 north shall be designated the “Sergeant Robert Kimberling Memorial Highway”, and two signs bearing this name shall be erected. One sign shall be placed north of the Frederick Boulevard interchange adjacent to the northbound lane of Interstate Highway 29, and the other shall be placed north of the United States Highway 169 north overpass adjacent to the southbound lane.