(a) The portion of State Highway 16 in Duval County between the northern municipal boundary of Freer and the southern boundary of McMullen County is designated as the Al Dean Memorial Highway. 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 highway number, the designation as the Al Dean 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.