(a) The commission, by the authority of the governor, may contract with an adjoining state to:
(1) provide for the improvement of a public road or highway that crosses the states' boundary; and
(2) establish respective responsibilities for the improvement.
(b) In a contract for an improvement of the state highway system that is subject to a contract under Subsection (a), the commission may provide for the improvement of a segment of a public road or highway located in the adjoining state if:
(1) the improvement of that segment is necessary for the health, safety, and welfare of the people of this state and for the effective improvement and operation of the state highway system;
(2) that segment is an extension or continuation of a segment of the state highway system;
(3) the contract under Subsection (a) is authorized and executed under the law of the adjoining state; and
(4) all costs associated with the improvement of that segment are the responsibility of the adjoining state.
(c) In this section, "improvement" includes construction, reconstruction, and maintenance.
Official text of the Texas Transportation Code as published by the Texas Legislative Council.