Texas Transportation Code - TRANSP § 394.002. Application of Chapter

(1) outdoors;  and

(2) visible from the main-traveled way of a rural road.

(1) that is located in an unincorporated area;

(2) that is not privately owned or controlled;

(3) any part of which is open to the public for vehicular traffic;  and

(4) that is under the jurisdiction of this state or a political subdivision of this state.