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Find a Commonwealth ResourceU.S Department of Transportation
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 agencies, and tribal…
Updated Oct 25, 2026
U.S Department of Transportation
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 Tunnel Inspection…
Updated Oct 25, 2026
Datathon 2025
The dataset contains data related to tunnel elements, their conditions, and quantities in Virginia state.
Updated Mar 23, 2026
