The Texas Department of Transportation, also known as TxDOT, is responsible for the maintenance of more than 80,000 miles of road. It supports aviation, rail and public transportation systems throughout Texas. The department maintains a work force of over 12,500 employees. The Texas Department of Transportation consists of nearly 20 divisions and approximately five offices. The department maintains construction, travel information, finance and public transportation divisions. It also offers online traffic safety tips. The Texas Department of Transportation operates the TxDOT Library, which is a central repository for forms, publications, strategic plans, key agency documents, reports, manuals, brochures and newsletters. The department provides vehicle inspection and motor carrier registration services. It is governed by the state of Texas.