United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization, Federal Highway Administration (U.S.), & United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology (2013). National Transportation Atlas Database (NTAD): Principal Ports 2013-Present Datasets. United States. Department of Transportation. Bureau of Transportation Statistics. https://doi.org/10.21949/1520847
United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization, Federal Highway Administration (U.S.), and United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology. National Transportation Atlas Database (NTAD): Principal Ports 2013-Present Datasets. United States. Department of Transportation. Bureau of Transportation Statistics, 2013. https://doi.org/10.21949/1520847.
United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization, et al. National Transportation Atlas Database (NTAD): Principal Ports 2013-Present Datasets. United States. Department of Transportation. Bureau of Transportation Statistics, 2013, ROSA P. https://doi.org/10.21949/1520847.
The ports are politically defined by port limits or Corps projects, excluding non-Corps projects not authorized for publication. The determination for the published Principal Ports is based upon the total tonnage for the port for the particular year; therefore the top 150 list can vary from year to year.
United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization, Federal Highway Administration (U.S.), & United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology (2013). National Transportation Atlas Database (NTAD): Principal Ports 2013-Present Datasets. United States. Department of Transportation. Bureau of Transportation Statistics. https://doi.org/10.21949/1520847
United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization, Federal Highway Administration (U.S.), and United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology. National Transportation Atlas Database (NTAD): Principal Ports 2013-Present Datasets. United States. Department of Transportation. Bureau of Transportation Statistics, 2013. https://doi.org/10.21949/1520847.
United States. Department of Transportation. Bureau of Transportation Statistics. Office of Spatial Analysis and Visualization, et al. National Transportation Atlas Database (NTAD): Principal Ports 2013-Present Datasets. United States. Department of Transportation. Bureau of Transportation Statistics, 2013, ROSA P. https://doi.org/10.21949/1520847.
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findings, journal articles, guidelines, recommendations, or other information authored or co-authored by
USDOT or funded partners. As a repository, ROSA P retains documents in their original published format to
ensure public access to scientific information.
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