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TRANSPORTATION RESEARCH BOARD 500 Fifth Street, NW Washington, DC 20001 www.TRB.org ADDRESS SERVICE REQUESTED CONFERENCE PROCEEDINgS 48 ISBN 978-0-309-22307-2 9 780309 223072 9 0 0 0 0 Financing Surface Transportation in the United States Forging a SuStainable Futureânow! SUMMARY OF The FOURTh inTeRnATiOnAl cOnFeRence