No person shall without lawful authority attempt to or in fact alter, deface, injure, knock down, or remove any official traffic control device, sign, or signal or any railroad sign or signal or any inscription, shield, or insignia thereon, or any part thereof.
Penalty, see § 10.99
Statutory reference:
Authority regarding traffic control devices, see Tex. Transp. Code § 544.002
Destruction of traffic control device unlawful, see Tex. Transp. Code § 544.005
Drivers to obey traffic control devices, see Tex. Transp. Code § 544.004