This bibliography is intended to serve as a guide to the major sources ofinformation in Intelligent Transportation Systems (ITS). While the focus is on the United States, some international materials have been included. Emphasis is on current materials, although publications of historical interest have also been included. Resources listed include print and electronic materials, as well as websites on the Internet. This bibliography is based primarily on the holdings of the Harmer E. DavisTransportation Library at the Institute of Transportation Studies, University of California at Berkeley. References for electronic documents and resources, and websites, are current as of November 2006.The electronic version of this bibliography is a component of the 6th edition of Sources of Information in Transportation, a collaborative effort by members of theTransportation Division of the Special Libraries Association.