From the junction of K-14 highway and NE 100 road in Harper county, then south on K-14 highway and United States highway 160, to the junction of United States highway 160 and K-2 highway, then south on K-2 highway to the northern city limits of the city of Anthony, is hereby designated as the SFC David R. Berry/SGT WillSun M. Mock memorial highway. The secretary of transportation shall place signs along the highway right-of-way at proper intervals to indicate that the highway is the SFC David R. Berry/SGT WillSun M. Mock memorial highway, except that such signs shall not be placed until the secretary has received sufficient moneys from gifts and donations to reimburse the secretary for the cost of placing such signs and an additional 50% of the initial cost to defray future maintenance or replacement costs of such signs. The secretary of transportation may accept and administer gifts and donations to aid in obtaining and installing suitable signs.