Selected state and national resources
National Transportation Library search
Search the collections of the National Transportation Library.
Research In Progress (RiP)
The Transportation Research Board's Research in Progress (RiP) website contains over 12,000 current or recently completed transportation research projects. Most of the RiP records are projects funded by federal and state departments of transportation. University transportation research is also included. Select international research projects are also included in the RiP database.
TRB Publications Index
The TRB Publications Index contains over 50,000 papers, articles, and reports published by the Transportation Research Board, Highway Research Board, Strategic Highway Research Program or the Marine Board from 1923 to date.
TRB Research Needs Statements
The Transportation Research Board's Technical Activities standing committees identify, develop, and disseminate research need statements (RNS) for use by practitioners, researchers, and others. The RNS on this website have been developed by the technical committees.