PORTS-TO-PLAINS CORRIDOR.

(a) The following highways are designated as the Ports-to-Plains Corridor:

(1) Interstate Highway 35 from the Mexican border at Laredo to its intersection with U.S. Highway 83;

(2) U.S. Highway 83 from its intersection with Interstate Highway 35 to its intersection with U.S. Highway 277 in Carrizo Springs;

(3) U.S. Highway 277 from its intersection with U.S. Highway 83 in Carrizo Springs to its intersection with U.S. Highway 87 in San Angelo;

(4) U.S. Highway 87 from its intersection with U.S. Highway 277 in San Angelo to Sterling City and on to Lamesa;

(5) State Highway 158 from its intersection with U.S. Highway 87 near Sterling City to its intersection with Interstate Highway 20 in Midland;

(6) Interstate Highway 20 from its intersection with State Highway 158 in Midland to its intersection with State Highway 349 in Midland;

(7) State Highway 349 from its intersection with Interstate Highway 20 in Midland to Lamesa;

(8) U.S. Highway 87 from Lamesa to its intersection with Interstate Highway 27 in Lubbock;

(9) Interstate Highway 27 from its intersection with U.S. Highway 87 in Lubbock to its intersection with U.S. Highway 287 in Amarillo; and

(10) U.S. Highway 287 from its intersection with Interstate Highway 27 in Amarillo to the Oklahoma state border.

(b) The department shall design and construct identifying markers indicating the highway number, the designation as the Ports-to-Plains Corridor, and any other appropriate information.

(c) Except as provided by Subsection (d), the department shall erect a marker at each end of the highway and at appropriate intermediate sites along the highway.

(d) The department is not required to design, construct, or erect a marker required by this section unless a grant or donation is made to the department to cover the cost of the design, construction, and erection of the marker.

(e) Money collected under Section 225.021 for the purpose of implementing this section shall be deposited to the credit of the state highway fund.