(a) The portion of Farm-to-Market Road 666 in Nueces County between its intersection with State Highway 44 and Farm-to-Market Road 624 is designated as the Kollyn Gene Barton Memorial Highway.
(b) Subject to Section 225.021(c), the department shall:
(1) design and construct markers indicating the designation as the Kollyn Gene Barton 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.