Texas Transportation Code - TRANSP § 394.087. Injunction

(a) A sign that is erected in violation of this chapter is a public nuisance.

(b) On written notice by certified mail from the department or the county, an owner of a sign that is a public nuisance under Subsection (a), or the owner of the property on which the sign is located, shall remove the sign.  If the sign is not removed within 45 days of the date of the notice, the department may direct the attorney general to apply for an injunction to require the removal of the sign or a district or county attorney may apply for an injunction to require the removal of the sign.

(c) The state or county is entitled to recover from the owner of a sign, or the owner of the property from which a sign is removed, under an action brought under Subsection (b) all administrative and legal costs and expenses incurred to remove the sign, including court costs and reasonable attorney's fees.