1. American Trucking Association Foundation, 1996. Assessment of Intelligent Transportation Systems/Commercial Vehicle User Services; ITS/CVO Qualitative Benefit and Cost Analysis. American Trucking Association, Alexandria VA
2. Bureau of Transportation Statistics, 1998. The Pocket Guide to Transportation, BTS-98-S-02. http://www.bts.gov/pg.pdf
3. Caltrans, 1998. Statewide Goods Movement Strategy, California Transportation Plan, Discussion Draft, March 1998. (http:/www.dot.ca.gov/hq/paffairs/ctp/paper3.html)
4. A longitudinal assessment of EDI use in the US Motor Carrier Industry;Crum;Transportation Journal,1998
5. Golob, T.F., Regan, A.C., 1998a. Freight Industry Attitudes Towards Policies to Reduce Congestion. Transportation Research, E, in press