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U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Port Performance Freight Statistics Program Technical Documentation

Thursday, January 20, 2022

The Bureau of Transportation Statistics’ (BTS) Port Performance Freight Statistics Program (PPFSP) provides nationally-consistent performance measures for the Nation’s largest ports by tonnage, container, and dry bulk, and to report annually to Congress on port capacity and throughput. This technical documentation for the PPFSP details the process used to identify the top 25 ports in dry bulk and containerized cargo and calculate their capacity and throughput. It also details the methodologies to calculate or define vessel calls, vessel dwell times, port terminal polygons, container terminal minimum project depth, and port vicinity maps.

BTS continues to review stakeholder comments and explore alternative data sources to expand port throughput and capacity statistics. Please send questions and comments on the Port Performance Freight Statistics Program technical documentation to