(a) The portion of Farm-to-Market Road 4000 in Titus County between its intersection with Farm-to-Market Road 1735 and the eastern municipal boundary of Mount Pleasant is designated as the Titus County Vietnam Veterans Memorial Highway.
(b) Subject to Section 225.021(c), the department shall:
(1) design and construct markers indicating the designation as the Titus County Vietnam Veterans 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.