"The TRT Web site allows users to access terminology through Alphabetical, Hierarchical, Keyword In Context or Keyword Out of Context displays. The full display shows relationship of terms including SN (Scope Notes), UF (used for terms), BT (Broader Term), NT (Narrower Term), and RT (Related Term). Through the use of the TRT's standardized vocabulary, the transportation community's access to information has been improved. A tool to improve the indexing and retrieval of transportation information. The TRT's purpose is to provide a common and consistent language between producers and users of transportation information. The thesaurus is currently also used as an indexing tool for federal, state and university collections."