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ACKNOWLEDGMENT This work was sponsored by the Federal Transit Administration (FTA) in cooperation with the Transit Development Corporation. It was conducted through the Transit Cooperative Research Program (TCRP), which is administered by the Transportation Research Board (TRB) of the National Academies. DISCLAIMER The opinions and conclusions expressed or implied in the report are those of the research agency. They are not necessarily those of the TRB, the National Research Council, the FTA, the Transit Development Corporation, or the U.S. Government. This report has not been edited by TRB.
