(a) The portion of U.S. Highway 287 in Wilbarger County between its intersection with County Road 111 and County Road 132 East is designated as the Molly Mullens Mile. 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 Molly Mullens Mile and any other appropriate information; and
(2) erect a marker at each end of the highway and at appropriate intermediate sites along the highway.