Texas Department of Transportation

Find Texas department of transportation, highway, roads, and bridge departments. Transportation departments provide information on public transport, including road, highway and bridge traffic, conditions, closures, tolls and travel information.


Transportation Departments by County

Anderson County Angelina County Aransas County Archer County Atascosa County Bailey County Bandera County Bastrop County Baylor County Bee County Bexar County Borden County Bosque County Bowie County Brazoria County Brazos County Brewster County Briscoe County Brown County Burnet County Caldwell County Calhoun County Callahan County Cameron County Carson County Cass County Castro County Cherokee County Childress County Clay County Coke County Coleman County Collin County Collingsworth County Comal County Comanche County Concho County Cooke County Coryell County Cottle County Crane County Crockett County Crosby County Culberson County Dallam County Dallas County Dawson County DeWitt County Deaf Smith County Delta County Denton County Dickens County Dimmit County Donley County Duval County Eastland County Ector County Edwards County El Paso County Ellis County Erath County Falls County Fannin County Fayette County Foard County Fort Bend County Freestone County Frio County Gaines County Galveston County Garza County Gillespie County Glasscock County Goliad County Gray County Grayson County Gregg County Grimes County Guadalupe County Hale County Hall County Hamilton County Hansford County Hardin County Harris County Harrison County Hartley County Haskell County Hays County Hemphill County Henderson County Hidalgo County Hill County Hockley County Hood County Hopkins County Houston County Howard County Hudspeth County Jack County Jackson County Jasper County Jefferson County Jim Hogg County Jim Wells County Johnson County Jones County Karnes County Kaufman County Kendall County Kent County Kerr County Kimble County Kleberg County Knox County Lamar County Lamb County Lampasas County Lavaca County Lee County Leon County Liberty County Limestone County Live Oak County Llano County Lubbock County Lynn County Madison County Martin County Mason County Matagorda County Maverick County McCulloch County McLennan County McMullen County Medina County Menard County Midland County Milam County Mitchell County Montague County Montgomery County Moore County Morris County Nacogdoches County Navarro County Newton County Nolan County Nueces County Ochiltree County Orange County Palo Pinto County Panola County Parker County Parmer County Pecos County Polk County Potter County Presidio County Rains County Randall County Reagan County Real County Red River County Reeves County Refugio County Roberts County Robertson County Rockwall County Runnels County Rusk County Sabine County San Jacinto County San Patricio County San Saba County Scurry County Shelby County Sherman County Smith County Somervell County Stephens County Sterling County Sutton County Swisher County Tarrant County Taylor County Terrell County Terry County Throckmorton County Titus County Tom Green County Travis County Trinity County Tyler County Upshur County Upton County Uvalde County Val Verde County Van Zandt County Victoria County Walker County Waller County Ward County Washington County Webb County Wichita County Wilbarger County Willacy County Williamson County Wilson County Wood County Yoakum County Young County

What is the Department of Transportation?

A Department of Transportation is a state or federal agency whose mission is to plan for and develop a fast, efficient, accessible, and convenient transportation system and infrastructure that effectively serves the citizenry and promotes economic vitality.

The U.S. Department of Transportation (USDOT) is a cabinet-level department headed by the Secretary of Transportation. The department is comprised of eleven offices and administrations primarily organized around modes of transportation. Much of what USDOT does is regulatory in nature. For example, the National Highway Traffic Safety Administration develops regulations for motor vehicle safety and for fuel efficiency standards. The Pipeline and Hazardous Materials Safety Administration regulates the nation's pipeline infrastructure and shipments of hazardous material by land, sea, and air.

The USDOT is a major source of funding for transportation capital projects, especially transit and highway projects. The Surface Transportation Program provides state and local governments approximately $10 billion annually in flexible funding for a wide range of improvements as well as capital planning purposes. Other significant USDOT grant programs include Airport Improvement Program grants based on the national plan of integrated airports, National Scenic Byways Program grants, and Congestion Mitigation and Air Quality Improvement grants.

At the state level, Departments of Transportation are responsible for maintaining and improving transportation infrastructure, including state roads and highways, bridges, airports, ports and waterways, public transit systems, and railways. Infrastructure maintenance often involves emergency response to accidents, disasters, and inclement weather such as winter storms. The state Department of Transportation manages the allocation of federal funding for transportation capital improvements and the use of any state funding sources dedicated for transportation purposes, such as toll proceeds and fuel taxes.

State Departments of Transportation establish design standards for transportation infrastructure projects and approve county and local projects before they are constructed. State Departments of Transportation also distribute grant funds to county and local governments for local projects.

State Departments of Transportation actively collaborate with universities or other partnering organizations to conduct research and evaluate innovations to transportation systems, such as new construction materials or design methods. Some states have begun participating in research on autonomous vehicles.