(a) The portion of Alternate United States Highway 90 in Lavaca County from the eastern municipal limits of Shiner to the western municipal limits of Hallettsville is designated as the Sheriff Ronnie Dodds Memorial Highway.
(b) Subject to Section 225.021(c), the department shall:
(1) design and construct markers indicating the designation as the Sheriff Ronnie Dodds 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.