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Annual Roadway Inventory Reports. The number centerline and lineal (lane) miles by county from the Texas Department of Transportation (PDF). See our County Profiles pages for easier access to the most recent data on county roads.

Bureau of Transportation Statistics. BTS compiles, analyzes, and makes accessible information on the Nation's transportation systems; collects information on intermodal transportation and other areas as needed.
Census Data for Transportation Planning. Census Data for Transportation Planning from the Transportation Planning Board's Subcommittee on Census Data for Transportation Planning.
Census Transportation Planning Package (CTPP). CTPP is designed for transportation planners. It contains tabulations by place of residence, place of work, and for flows between home and work.
Federal Highway Statistics. From the Federal Highway Administration, Office of Highway Information Management. This information, updated annually, was developed primarily to meet FHWA and State needs in administering the Nation's highway programs. This site also has a link to table revisions/updates.
Texas Engineering Extension Service. TEEX is a state agency that provides training, retraining, continuing education, technical assistance and technology transfer services on an extension basis. Courses include: Construction equipment, Fire protection, Law enforcement and security, Occupational and environmental safety, Public works, Technology and economic development, Telecommunications, Transportation, Water and wastewater, etc.
Texas Transportation Institute. TTI conducts interdisciplinary and multi-modal research extending into the planning, design, construction, operation, maintenance, enforcement, economic, environmental, and social aspects of transportation.
U.S. Department of Transportation. Access Bureau of Transportation Statistics, Search the DOT web site, or link to the Federal Aviation Administration (FAA), the Federal Highway Administration, the Federal Railroad Administration, etc.
Unit Road System Report. See the County Roads section of the CIP Products page.