USDOT_BTS_NTAD_National_Tunnel_Inventory eng; USA 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646 information applies to the dataset National Bridge and Tunnel Inventory Team Federal Highway Administration (FHWA) 202-366-5658 1200 New Jersey Ave. SE Washington DC 20590 United States NBTIS_Support@dot.gov party who can be contacted for acquiring knowledge about or acquisition of the resource 2025-09-03 ISO 19139 Geographic Information - Metadata ISO/TS 19139:2007 point 580 3857 EPSG National Tunnel Inventory 2019-07-01 date identifies when the resource was brought into existence 2025-09-02 date identifies when the resource was examined or re-examined and imporved or amended Federal Highway Administration (FHWA) party who created the resource map represented in raster or vector form The National Tunnel Inventory 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 inventory data present a complete picture of the location, description, and classification data for each tunnel, as well as any load rating and inspection information. The Specifications for the National Tunnel Inventory (SNTI) contains a detailed description of each data element including coding instructions and attribute definitions. The Coding Manual is published for each year of data collection; the manual is available at: https://doi.org/10.21949/1519104. For additional questions regarding regulations for the National Tunnel Inventory or the Coding Guide please contact the National Bridge and Tunnel Inventory team at NBTIS_Support@dot.gov. For questions on the geospatial component of the dataset, contact the NTAD team at NTAD@dot.gov. A data dictionary, or other source of attribute information, is accessible at https://doi.org/10.21949/1529051 Data in the NTI is used to meet legislative reporting requirements and provide tunnel owners, the Federal Highway Administration (FHWA) and the general public with information on the number and condition of the Nation’s tunnels. Acknowledgment of the Federal Highway Administration (FHWA) and the Bureau of Transportation Statistics (BTS) [distributor]. data is continually being updated National Bridge and Tunnel Inventory Team Federal Highway Administration (FHWA) 202-366-5658 1200 New Jersey Ave. SE Washington DC 20590 United States NBTIS_Support@dot.gov party who can be contacted for acquiring knowledge about or acquisition of the resource data is updated every year NTAD National Transportation Atlas Database Transportation Atlas Database vector point Inventory Tunnel Element Element Tunnel Tunnels Condition keyword identifies a particular subject or topic none USA National keyword identifies a location none 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. limitation not listed Access Constraints: unrestricted National Transportation Atlas Database 2025-09-02 publication Bureau of Transportation Statistics (BTS) party who published the resource reference to a master dataset of which this one is a part vector data is used to represent geographic data eng; USA transportation Native Dataset Environment: Version 6.2 (Build 9200) ; Esri ArcGIS 10.8.1.14362 -157.855777779589 -65.873610999692914 18.008889000176772 60.785659999908859 2025-08-26 0 National Tunnel Inventory A data dictionary resource of attribute information is accessible at https://doi.org/10.21949/1529051 Open Data Catalog 1.0 ArcGIS REST Services Directory Feature Server (WFS) 11.5 Bureau of Transportation Statistics (BTS) NTAD Program Manager 1200 New Jersey Ave. SE Washington DC 20590 United States ntad@dot.gov party who distributes the resource None. No fees are applicable for obtaining the dataset. https://doi.org/10.21949/1522168 http Open Data Catalog Web page to view and download dataset. The file download formats available include: ESRI File Geodatabase or Shapefile, GeoPackage, Comma-Seperated Values (CSV), Microsoft Excel, GeoJSON, KML, Feature Collection, and SQLite Geodatabase. online instructions for transferring data from one storage device or system to another https://doi.org/10.21949/1522170 http ArcGIS REST Services Directory Feature Server (WFS) complies with OGC WFS Map Service for visualizing geospatial information online instructions for transferring data from one storage device or system to another information applies to the dataset Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. 23 CFR 650 Subpart E (National Tunnel Inspection Standards) requires that States, federal agencies, and tribal governments maintain an inventory of all public highway tunnels within their jurisdiction, and submit that data to the Federal Highway Administration (FHWA) annually or as requested. Tunnels that are not federally or tribally owned (i.e. local or privately owned tunnels) are submitted by the State. Regulation requires data to be submitted March 15th of each year, though there may be updates throughout the year. The dataset is archived on December 31st and typically published in January. data is updated as deemed necessary National Bridge and Tunnel Inventory Team Federal Highway Administration (FHWA) 202-366-5658 1200 New Jersey Ave. SE Washington DC 20590 United States NBTIS_Support@dot.gov party that accepts accountability and responsability for the data and ensures appropriate care and maintenance of the resource