TRB's National Cooperative Highway Research Program (NCHRP) Report 643: Implementing Transportation Knowledge Networks explores a business plan for the development of Transportation Knowledge Networks (TKNs) in the United States. The business plan defines ten key products and services to be provided to transportation practitioners by the regional TKNs, with support from a national coordination function. TKNs are defined as “decentralized, managed networks linking information providers to users wherever they are located.”

Note Added 10/22/2010 - In a follow-up effort, the research team developed an Directory of U.S. transportation libraries and information centers that could be potential participants in the TKNs. The directory is available online at the National Transportation Library website.