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    • Marine Highways

    Metadata Updated: September 11, 2025

    The Marine Highways dataset was created on June 15, 2016 and was updated on September 10, 2025 by the U.S. Maritime Administration (MARAD) and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics (BTS) National Transportation Atlas Database (NTAD). The United States Marine Highway Program is a Maritime Administration-led program to expand the use of our Nation's navigable waterways to relieve landside congestion, reduce air emissions, and generate other public benefits by increasing the efficiency of the surface transportation system (https://www.maritime.dot.gov/grants/marine-highways/marine-highway). This dataset contains the locations of all 35 maritime routes that have been designated as Marine Highways by the Secretary of the U.S. Department of Transportation. Routes included in this dataset are diagrammatic and may not depict all waterways and port connectors that are considered to be part of the U.S. Marine Highway System. A data dictionary, or other source of attribute information, is accessible at https://doi.org/10.21949/1529036

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Date September 10, 2025
    Metadata Created Date August 3, 2024
    Metadata Updated Date September 11, 2025
    Reference Date(s) July 1, 2018 (creation), September 10, 2025 (revision)
    Frequency Of Update asNeeded

    Metadata Source

    Harvested from National Transportation Atlas Database (NTAD) Metadata

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Date September 10, 2025
    Metadata Created Date August 3, 2024
    Metadata Updated Date September 11, 2025
    Reference Date(s) July 1, 2018 (creation), September 10, 2025 (revision)
    Responsible Party U.S. Maritime Administration (MARAD) (Point of Contact)
    Contact Email
    Guid Marine Highways
    Access Constraints Access Constraints: unrestricted
    Bbox East Long 145.98079922506125
    Bbox North Lat 72.19972000000449
    Bbox South Lat -17.555012216504053
    Bbox West Long -173.74646781770332
    Coupled Resource
    Frequency Of Update asNeeded
    Harvest Object Id b0698f5d-8dac-4d69-8f3a-56fcaa0bdd33
    Harvest Source Id ee45e034-47c1-4a61-a3ec-de75031e6865
    Harvest Source Title National Transportation Atlas Database (NTAD) Metadata
    Licence This NTAD dataset is a work of the United States government as defined in 17 U.S.C. § 101 and as such are not protected by any U.S. copyrights. This work is available for unrestricted public use.
    Lineage
    Metadata Language eng; USA
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-173.74646781770332, -17.555012216504053], [145.98079922506125, -17.555012216504053], [145.98079922506125, 72.19972000000449], [-173.74646781770332, 72.19972000000449], [-173.74646781770332, -17.555012216504053]]]}
    Progress onGoing
    Spatial Data Service Type
    Spatial Reference System 3857
    Spatial Harvester True

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