(a) The portion of Interstate Highway 20 in Howard County between mile marker 173 and mile marker 190 is designated as the Trooper Troy Hogue Memorial Highway. The designation is in addition to any other designation.
(b) Subject to Section 225.021(c), the department shall:
(1) design and construct markers indicating the designation as the Trooper Troy Hogue Memorial Highway and any other appropriate information; and
(2) erect a marker at each end of the highway and at appropriate intermediate sites along the highway.