National Transportation LibraryThe National Transportation Library (NTL) is a repository of U.S. DOT transportation information, serves as a portal transportation data, and provides library services to U.S. DOT employees. NTL’s mission is to maintain and facilitate access to statistical and other information needed for transportation decision-making at the Federal, State, and local levels and to coordinate with public and private transportation libraries and information providers to improve information sharing among the transportation community. Established in 1998 by the Transportation Equity Act for the 21st Century (TEA-21), NTL’s authorized role was expanded in 2012’s Moving Ahead for Progress in the 21st Century (MAP-21).