(a) The portion of Interstate Highway 20 in Ward County between mile marker 80 and mile marker 82 is designated as the Trooper Billy Jack Zachary 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 Trooper Billy Jack Zachary 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.