Tunnel Inspection
Regulation
- National Tunnel Inspection Standards (NTIS) (.pdf) (7/13/15)
- Supporting documents for the Supplemental Notice of Proposed Rulemaking (SNPRM) on the National Tunnel Inspection Standards (07/30/2013)
- Notice of Proposed Rulemaking on the National Tunnel Inspection Standard (07/22/2010)
- Advanced Notice of Proposed Rulemaking on the National Tunnel Inspection Standard (11/18/2008)
Policy
- Specifications for the National Tunnel Inventory (.pdf) (June, 2015)
- National Tunnel Inventory - Inventory and Element Data (.pdf, 0.1 mb)
- Preliminary National Tunnel Inventory - Inventory Data (.pdf, 0.1 mb)
- Preliminary NTI XML Schema (.xsd, 0.1 mb)
- Example XML (.xml)
- Tunnel Operations, Maintenance, Inspection, and Evaluation (TOMIE) Manual (.pdf) (July, 2015)
Guidance
- Inspection of Bridges and Tunnels on Transit Highway (08/23/2016)
- Guidance on Structures Subject to the National Tunnel Inspection Standards (NTIS) (10/27/15)
- Inspection of Overhead Connections in Tunnels (11/05/2012)
- Use and Inspection of Adhesive Anchors in Federal-Aid Projects (T 5140.30) (03/21/2008)