Texas Department of Transportation:Official page.
Austin Toll Party: Group opposing the toll road plans in and around that city. Site includes maps and feedback form.
CorridorWatch.org: A group of public officials and private citizens opposed to the Texas Department of Transportation's proposed Trans-Texas Corridor, a wide multimodal rebuild of certain highways. Website includes membership information, discussion forum, maps, and government transcripts.
DFWFreeways.info: Includes historical information on and photographs of freeways in the Dallas - Fort Worth area.
Grand Parkway: The official page for the proposed outer-outer-beltway around Houston, also called TX 99. Maps, hearing records, and general information.
Houston Highways: Route log and exit lists.
Interstate Highways in Texas: Includes history.
Lone Star Roads: Contains many aspects covering the state, including highway types, exit lists, and photographs.
North Texas Tollway Authority: Information and news for the toll roads in Dallas. Details on the TollTag system.
Project Pegasus: Information concerning the IH 30/IH 35E Canyon, Mixmaster and Lower Stemmons Freeway projects in Dallas.
Southeast Texas Highways: Includes route log and exit lists.
Texas Highway Routes: Legal descriptions. Comprehensive.
Texas HighwayMan Pages: Various details including a highway primer and a comprehensive San Antonio page.
TexasFreeway.com: Detailed schematics and history.
Trans-Texas Corridor: Weblog providing political commentary and information. The site includes links to related websites and sites of elected officials in the state.