(a) The portion of State Highway 21 in Nacogdoches County between its intersection with County Road 511 and its intersection with Farm-to-Market Road 95 is designated as the Bob Luman Memorial Highway. The designation is in addition to any other designation.
(b) Subject to § 225.021(c), the department shall:
(1) design and construct markers indicating the designation as the Bob Luman 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.