papers, as revised by their authors after the symposium, are contained in Volume 2 of this Special Report. Volume 1 contains the committee 's overview of the material contained in the commissioned papers, its conclusions, and recommendations regarding the potential of congestion pricing, the need for evaluation of early demonstrations, and other research needs.

Several of the members selected for this study committee and several of the authors of commissioned papers reside in California. There is good reason for this representation. Congestion pricing as a concept and proposal has been more extensively studied in California in recent years than elsewhere in the United States, and the only experimentation with congestion pricing moving forward at the time of this writing is occurring in California.

The report was reviewed by an independent group of reviewers in accordance with National Research Council report review procedures.

The report was performed under the overall supervision of Robert E. Skinner, Jr., Director, Studies and Information Services, Transportation Researach Board, and Susanne A. Stoiber, Director, Division on Social and Economic Studies, Commission on Behavioral and Social Sciences and Education. Stephen R. Godwin served as study director and, under the guidance of the committee, drafted the report.

The final report was edited and prepared for publication under the supervision of Nancy A. Ackerman, Director, Reports and Editorial Services, Transportation Research Board. Naomi Kassabian was the editor for the report. Frances E. Holland provided word processing support and, along with Marguerite E. Schneider, provided assistance in meeting logistics and committee correspondence.