Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content

Try the next-generation Data Catalog at catalog-beta.data.gov and help shape it with your feedback.

  • Feedback

    • National Tunnel Inventory Element Data

    Metadata Updated: September 5, 2025

    The National Tunnel Inventory Elements dataset was compiled on September 02, 2025 and published on August 26, 2025 from the Federal Highway Administration (FHWA) and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics (BTS) National Transportation Atlas Database (NTAD). The National Tunnel Inventory (NTI) is a collection of information (database) describing the more than 500 of the Nation's tunnels located on public roads, including Interstate Highways, U.S. highways, State and county roads, as well as publicly-accessible tunnels on Federal lands. The element data present a breakdown of the condition of each structural and civil element for each tunnel on the National Highway System (NHS). A data dictionary, or other source of attribute information, is accessible at https://doi.org/10.21949/1529051

    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 4, 2025
    Metadata Created Date August 3, 2024
    Metadata Updated Date September 5, 2025
    Reference Date(s) July 1, 2019 (creation), September 2, 2025 (revision)
    Frequency Of Update annually

    Metadata Source

    Harvested from National Transportation Atlas Database (NTAD) Metadata

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Date September 4, 2025
    Metadata Created Date August 3, 2024
    Metadata Updated Date September 5, 2025
    Reference Date(s) July 1, 2019 (creation), September 2, 2025 (revision)
    Responsible Party Federal Highway Administration (FHWA) (Point of Contact)
    Contact Email
    Guid National Tunnel Inventory Element Data
    Access Constraints Access Constraints: unrestricted
    Coupled Resource
    Frequency Of Update annually
    Harvest Object Id 6b7e4dff-88d3-4ede-8f90-c715d9e151c6
    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
    Progress onGoing
    Spatial Data Service Type
    Spatial Reference System 3857
    Spatial Harvester True

    Didn't find what you're looking for? Suggest a dataset here.