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TRID is the world's largest and most comprehensive bibliographic resource on transportation research information. TRID covers all modes and disciplines of transportation and contains more than 1,090,000 records of published research. More than 156,000 records contain links to full-text documents. TRID combines the records from TRB's Transportation Research Information Services (TRIS) Database and the OECD's Joint Transport Research Centre’s International Transport Research Documentation (ITRD) Database. Records in TRID are indexed with a standardized vocabulary from the Transportation Research Thesaurus (TRT), ITRD Thesaurus or a different thesaurus depending on the source organization.
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