Under Section 52, Article III, Texas Constitution, the district may own, operate, maintain, design, acquire, construct, finance, issue bonds, notes, or other obligations for, improve, and convey to this state, a county, or a municipality, for ownership, operation, and maintenance, macadamized, graveled, or paved roads or improvements, including storm drainage, in aid of those roads.
Tex. Spec. Dist. Loc. Laws § 3901.104