The Texas Department of Transportation (TxDOT) is a government agency responsible for the planning, construction, and maintenance of the state's transportation system. This includes highways, bridges, airports, and public transportation systems. TxDOT was established in 1991 and is headquartered in Austin, Texas. The agency has over 12,000 employees and a budget of over $30 billion. TxDOT is responsible for overseeing the state's highway system, which is one of the largest in the country, with over 80,000 miles of highways and roads.