Tex. Transp. Code § 204.001
(a) To provide information relating to highway construction, repair, and maintenance and to advertise and attract traffic to the highways of this state, the department may prepare and publish for distribution, in the manner and form the department considers best, documents the department considers necessary and expedient to publicize and provide information concerning:
(b) The department periodically may prepare a map showing:
Added by Acts 2003, 78th Leg., ch. 1276, Sec. 16.001(a), eff. Sept. 1, 2003.