(a) The portion of U.S. Highway 84 in Freestone County is designated as the Trooper Damon Allen Memorial Highway.
(b) Subject to Section 225.021(c), the department shall:
(1) design and construct markers indicating the designation as the Trooper Damon Allen 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.