Initial, Routine, Damage, In-Depth, and Special Inspections for Highway Tunnels

National Tunnel Inspection Standards

Documents and Forms

Document Name Document Type
Form FHWA-NTI-1 Initial, Routine, Damage, In-Depth, and Special Inspections for Highway Tunnels Form
FHWA-NTI-1 Specifications for the National Tunnel Inventory SNTI Specifications for the National Tunnel Inventory (SNTI) Form 2024 v1.1.pdf Form

Information Collection (IC) Details