(a) The portion of Interstate Highway 2 in the municipal limits of McAllen is designated as the Trooper Ernesto Alanis 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 Trooper Ernesto Alanis 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.