TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 410: Freight Transportation Surveys profiles the state of the practice in methods and techniques used to survey and collect data on freight transportation. The report also examines issues, identifies gaps in knowledge, and notes areas for potential future research in the area of freight transportation systems.
National Research Council. NCHRP Synthesis 410: Freight Transportation Surveys. Washington, DC: The National Academies Press, 2011.
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