Introduction
This tenth revised edition incorporates all of the recommendations and additions resulting from the
NCHRP Project 20-75, Implementing Transportation Knowledge Networks.
With over 350 entries in the Directory, there are many enhancements:
The entries are now categorized as either a Library, Technical Assistance Provider or Data/Other Information Provider.
If there is an error in the record or an update is desired, please forward changes or additions to NTL. Moreover, if a library is
omitted, please contact NTL and we will be happy to add it.
Contact NTL staff
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