ROADS/BRIDGES: FHWA launches national tunnel inspection program

July 15, 2015

The FHWA is modeling the national tunnel inspection intiative after longstanding bridge program.

The U.S. DOT’s Federal Highway Administration (FHWA) published the final rule for national tunnel inspection standards that will serve as the foundation of the nation’s first standardized tunnel inspection program. It will be modeled after the FHWA’s successful bridge program established nearly a half-century ago to ensure the safety of the nation’s bridges.

“This important step to keep our nation’s tunnels safe for the traveling public is unprecedented,” said U.S. Transportation Secretary Anthony Foxx. “Establishing national standards will help us maintain a high level of quality and uniformity in tunnel inspections nationwide.”

Up until now, FHWA has provided tunnel inspection guidance but had no means by which to require tunnel owners, such as state departments of transportation or other transportation agencies, to inspect tunnels. In addition, tunnel inspection methods have varied widely. With this new program, FHWA will compile an inventory of the nation’s tunnels and begin to develop a national database similar to the National Bridge Inventory (NBI).

The new standards, referred to as National Tunnel Inspection Standards (NTIS), are modeled after the National Bridge Inspection Standards (NBIS) currently used to ensure the inspection of bridges throughout the country. The NTIS include similar inspection requirements and annual reports of tunnel condition information and inspection findings. The requirements will include routine inspections of tunnels on all public roads along with written reports to FHWA, training and a national certification program for tunnel inspectors, and the timely correction of any deficiencies with tunnels.

“Just like bridges, each tunnel is structurally unique and requires dedicated attention and uniform measurement standards,” said Acting Federal Highway Administrator Gregory Nadeau.

To support the implementation of the Standards, FHWA has developed several guidance documents and manuals. The agency will offer training to state and local engineers on how to conduct highway tunnel inspections, including on what elements to inspect and how to code and record the results.

Sponsored Recommendations

The Science Behind Sustainable Concrete Sealing Solutions

Extend the lifespan and durability of any concrete. PoreShield is a USDA BioPreferred product and is approved for residential, commercial, and industrial use. It works great above...

Proven Concrete Protection That’s Safe & Sustainable

Real-life DOT field tests and university researchers have found that PoreShieldTM lasts for 10+ years and extends the life of concrete.

Revolutionizing Concrete Protection - A Sustainable Solution for Lasting Durability

The concrete at the Indiana State Fairgrounds & Event Center is subject to several potential sources of damage including livestock biowaste, food/beverage waste, and freeze/thaw...

The Future of Concrete Preservation

PoreShield is a cost-effective, nontoxic alternative to traditional concrete sealers. It works differently, absorbing deep into the concrete pores to block damage from salt ions...