(a) Those portions of Interstate Highway 20 located between the Tarrant-Parker County Line and the eastern municipal boundary of Grand Prairie and between the Dallas-Kaufman County Line and the Texas-Louisiana border are designated as the Ronald Reagan Memorial Highway.
(b) The department shall design and construct memorial markers indicating the highway number, the designation as the Ronald Reagan Memorial Highway, and any other appropriate information.

(c) The department shall erect a marker at each end of the highway and at appropriate intermediate sites along the highway.
(d) Notwithstanding Subsections (b) and (c), the department is required to design, construct, and erect the markers only to the extent that money is available for this purpose from a grant or donation of private funds.
(e) Funds collected under § 225.021 for the purpose of implementing this section, shall be deposited to the credit of the state highway fund.