National Tunnel Inspection Standards

OMB 2125-0640

Latest Forms, Documents, and Supporting Material

Document Name
Form FHWA-NTI-1 Initial, Routine, Damage, In-Depth, and Special Inspections for Highway Tunnels Form
Supporting Statement A- NTI 2024.docx Supporting Statement A
30Day FRN.pdf Supplementary Document
60Day FRN.pdf Supplementary Document
23 CFR Part 650 Subpart E (up to date as of 1-31-2024).pdf Supplementary Document
Critical Findings on Highway Tunnels
Initial, Routine, Damage, In-Depth, and Special Inspections for Highway Tunnels Form
Follow up on Critical Findings
Routine Inspection Reporting
Preliminary National Tunnel Inventory