Texas Department of Transportation
The Texas Department of Transportation (TxDOT ) is a Texas state government agency responsible for construction and maintenance of the state's immense state highway system and the support of the state's maritime, aviation, rail, and public transportation systems. TxDOT previously administered vehicle registration prior to the creation of the Texas Department of Motor Vehicles in November 2009.
Source: Wikipedia — Texas Department of Transportation (CC BY-SA 4.0)