(a) The portion of Farm-to-Market Road 685 in Travis County that runs south from State Highway 130 to East Pecan Street is designated as Deputy Jessica Hollis Memorial Highway.
(b) Subject to § 225.021(c), the department shall:
(1) design and construct markers indicating the designation as the Deputy Jessica Hollis 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.