Updated quarterly. Provides bibliographic coverage of transportation research and economic information. Coverage is international. Includes research reports, books, articles from journals and reviews, theses, standards and specifications, conference proceedings, and summaries of research in progress. Contains the TRIS file of the Transportation Research Board and well as the OECD's International Road Research Documentation database and the TRANSDOC file of the European Conference of Ministers of Transport. TRIS Online is also available.