Jesus M. Rohena, P.E Senior Tunnel Engineer Federal Highway Administration
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1 Jesus M. Rohena, P.E Senior Tunnel Engineer Federal Highway Administration
2 What is a tunnel? NFPA: ``enclosed roadway for motor vehicle traffic with vehicle access that is limited to portals.'' T-20: ``enclosed roadways with vehicle access that is restricted to portals regardless of type of structure or method of construction. Tunnels do not include highway bridges, railroad bridges or other bridges over a roadway. Tunnels are structures that require special design considerations that may include lighting, ventilation, fire protection systems, and emergency egress capacity based on the owner's determination.
3 STATES WITH THE MOST TUNNELS STATE NUMBER OF TUNNELS CA 61 WA 48 CO 38 NC 29 DC 18 PA 17 VA 17 NY 16
4 US Tunnel Interesting Facts 353 HIGHWAY TUNNELS IN 33 STATES AND THE District of Columbia 78,000 lineal feet in 17 tunnels in PA 72,000 lineal feet in 10 tunnels in NY Approximately 100 miles of highway tunnels in the US 117 tunnels with no lighting system Longest single tunnel Anton Anderson Memorial, 12,600 feet long Only dual mode tunnel in the world - Anton Anderson Memorial
5 NBIS (23 CFR 650) FHWA bridge inspection regulations were developed as a result of the Federal Aid Highway Act of 1968 (23 U.S.C. 151). But, tunnels were not included.
6 Why an NTIS? Currently, there is no uniformity on how frequent tunnels are inspected. The frequency of tunnel inspections varies from one month to 10 years. Some owners in cold climates walk through air ducts on a daily basis to identify potential icing problems due to water leakage. Some owners inspect mechanical and electrical equipment on daily basis and many other perform such inspections on a monthly basis.
7 Tunnel are getting older The majority range in age from 51 to 100 years. TUNNEL AGE YEAR CONSTRUCTED NUMBER OF TUNNELS < 10 YEARS 1991 or Later to to to to to to to to to to > or prior 13
8 NTIS More than 300 Highway Tunnels in the US Average age Tunnels is 44 years. Average age for Interstate system tunnels is 39 years. Some tunnels have other components than structural elements that need to be inspected also, like electrical, mechanical, ventilation, fire safety and security systems.
9 Why an NTIS? The proposed NTIS is closely aligned with the Grand Challenges identified by the AASHTO Subcommittee on Bridges and Structures in their report published in June This includes: Challenge 1, Extending the Service Life of Tunnels; and Challenge 5, Monitoring Bridge (Tunnel) Condition.
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11 Purpose of the NTIS to locate, evaluate, and act on existing tunnels deficiencies to ensure the safety of the traveling public.
12 Why an NTIS? After the CA/T Ceiling collapse, the National Transportation Safety Board (NTSB) recommended that the FHWA seek legislative authority to establish a mandatory tunnel inspection program that would identify critical inspection elements and specify an appropriate inspection frequency.
13 Notice of Proposed Rulemaking (NPRM) On November 2008, FHWA published an ANPRM for soliciting comments from AASHTO and all interested and knowledgeable parties to develop a NTIS. The ANPRM closed on February The FHWA is working in addressing the comments received to the ANPRM.
14 CA Truck Tunnel Disaster (October 2007)
15 Accomplished, ongoing, and future activities FHWA/FTA Inspection Guidelines for rail and road tunnels available FHWA/FTA Maintenance and Rehabilitation for rail and road tunnels available TMS software - available FHWA LRFD Road Tunnel Design Manualavailable AASHTO,FHWA,NCHRP International Tunnel Scan
16 Accomplished, ongoing, and future activities SHRP 2 Project Rapid NDT detection of voids and anomalies within and beyond tunnel linings Ongoing AASHTO,FHWA,NCHRP Domestic Tunnel Scan 2009 FHWA TOMIE Manual is being developed Tunnel Inspector Training course needed National Tunnel Inventory Database needed Tunnel Coding Guide - needed
17 Conclusions Tunnels are more complex than bridges, therefore all systems must be inspected and tested An NTIS is being developed, a NPRM will be coming out soon. A National Tunnel Inventory Database is needed A Coding Guide is needed Training is needed
18 Our challenge is to make our tunnels safer than yesterday and tomorrow safer than today. Thank You!
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