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home transport research international documentation trid toggle navigation menu national academies of sciences engineering and medicine transportation research board site contents about trb annual meeting calendar committees panels programs projects publications resources databases connect with trb home mytrb contact us directory e newsletter home trid trid the tris and itrd database advanced search hot topics more topics knowledge management km practice reports projects for employees workforce and organizations artificial intelligence ai artificial ingelligence neural networks intelligent agents trid trid is an integrated database that 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 trid provides access to 1 5 million records of transportation research worldwide video new trid video tutorial series is available this series includes short videos on starting your transportation research with trid as well as basic and advanced search techniques to get the most out of the database due to licensing restrictions the trid database or any portion thereof may not be used to train any large language model llm resources frequently asked questions about trid documentation training materials trid search help trid coverage trid serials trb research in progress trt transportation research thesaurus international transport research documentation itrd literature searches and literature reviews for transportation research projects submit publication get a tridget recent records by mode aviation highway marine transportation motor carriers pedestrians and bicyclists pipelines public transportation railroads contact questions or comments e mail tris trb nas edu the national academies of sciences engineering and medicine 500 fifth street nw washington dc 20001 τ 202 334 2000 copyright 2026 national academy of sciences all rights reserved terms of use and privacy statement due to licensing restrictions the trid database or any portion thereof may not be used to train any large language model llm national academies of sciences engineering and medicine