HIFLD OPEN National Tunnel Inventory

Principal Investigator(s):  View help for Principal Investigator(s) Federal Highway Administration (FHWA); Department of Homeland Security

Version:  View help for Version V1

Name File Type Size Last Modified
metadata.xml application/xml 36.7 KB 11/06/2025 09:49:PM
national-tunnel-inventory-geojson.zip application/zip 77.5 KB 11/06/2025 09:49:PM
national-tunnel-inventory-geopackage.zip application/zip 81.7 KB 11/10/2025 09:36:PM

Project Citation: 

Federal Highway Administration (FHWA), and Department of Homeland Security. HIFLD OPEN National Tunnel Inventory. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2025-11-11. https://doi.org/10.3886/E240027V1

Project Description

Project Title:  View help for Project Title HIFLD OPEN National Tunnel Inventory
Summary:  View help for Summary The National Tunnel Inventory dataset was compiled on July 22, 2024 and published on July 24, 2024 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 element data present a breakdown of the condition of each structural and civil element for each tunnel on the National Highway System (NHS). 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.
Original Distribution URL:  View help for Original Distribution URL https://hifld-geoplatform.hub.arcgis.com/

Scope of Project

Subject Terms:  View help for Subject Terms HIFLD Open; GIS; National Transportation Atlas Database; Inventory; Tunnel Element; Transportation Ground; Emergency Preparedness; Disaster Planning; Infrastructure
Geographic Coverage:  View help for Geographic Coverage United States
Time Period(s):  View help for Time Period(s) 7/1/2019 – 7/22/2024
Data Type(s):  View help for Data Type(s) geographic information system (GIS) data
Collection Notes:  View help for Collection Notes Archived from the HIFLD Open GIS data repository, which was deactivated on August 26, 2025. (Downloaded 08/26)


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Published Versions

V1 [2025-11-11]

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