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The Transportation Research Information Services (TRIS) database is the largest online bibliographic database of transportation research. TRIS now contains more than 650,000 records of published research covering all modes and disciplines of transportation. TRIS is produced and maintained by the Transportation Research Board of the National Academies with sponsorship by state Departments of Transportation and the administrations of the U.S. Department of Transportation, and other sponsors of TRB’s core technical activities.

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This version of TRIS does not include the international records from the International Transport Research Document (ITRD) Database. For information on access to ITRD go to http://www.itrd.org

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