• INFORMS
  (The INstitute For Operations Research and the Management Sciences:
  The world's largest OR and Management Science society. Publishes research journals Operations Research, Management Science, Transportation Science, Manufacturing and Service Operations Management, Decision Analysis, Organisational Science, Marketing Science, etc)
• Monograph on Traffic Flow Theory
  Edited by Nathan H. Gartner, Carroll J. Messer, and Ajay K. Rathi, November 1997. (An update and expansion of Transportation Research Board Special Report 165, "Traffic Flow Theory," 1975.)
• Online Transport Demand Management (TDM) Encyclopedia
  from VTPI (Victoria Transport Policy Institute (VTPI), Victoria, BC, Canada).
• TrafficLinq
  Classified directories of links to hundreds of transportation web sites worldwide.
• TransportConnect
  "Elsevier's online information pages for the transportation research community."
• The Transport Web
  Classified directories of links to hundreds of transportation web sites worldwide, for the transport industry.
• Transportation Research Board
• The Universities Transport Study Group (UTSG), UK
• The US Department of Transportation (US DOT)

SOME ITS (INTELLIGENT TRANSPORT SYSTEMS) WEBSITES

• ITS America
  "Website of the Intelligent Transportation Society of America." (July 2003). Set up in 1991.
• ITS Europe (ERTICO)
  "ERTICO is a Europe-wide, not-for-profit, public/private partnership for the implementation of Intelligent Transport Systems and Services (ITS). Set up in 1991 at the initiative of the European Commission as well as key members of European ITS industry and national governments." (July 2003).
• ITS Canada
  "Transport Canada's Intelligent Transportation Systems (ITS) website." (July 2003).