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#1 Federal
National Tunnel Inventory (NTI)
- Organization: Department of Transportation
- Dataset Last Updated: September 03, 2026
The NTI is an aggregation of structure inventory and appraisal data of tunnels located on public roads submitted by States, Federal agencies and Tribal governments in accordance with the National...
- XLSX
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- +2 more
Search relevance: 1.00 | Views last month: 8 | Catalog Last Checked: October 15, 2026 at 08:48 PM
#2 Federal
National Tunnel Inventory
- Organization: Department of Transportation
- Dataset Last Updated: November 02, 2026
The National Tunnel Inventory (NTI) records structural, operational, and safety inspection data for public highway tunnels across the United States. State departments of transportation, federal...
- JSON
- XML
- CSV
Search relevance: 1.00 | Views last month: 2 | Catalog Last Checked: November 02, 2026 at 10:47 PM

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