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#1 Federal
National Tunnel Inventory (NTI)
- Organization: Department of Transportation
- Updated: 2024-05-08
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...
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Search relevance: 1.00 | Views last month: 6 | Published on: 2025-08-01

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National Tunnel Inventory (NTI)