In March of 2001, the Federal Highway Administration (FHWA), in conjunction with the Federal Transit Administration (FTA), engaged Gannett Fleming, Inc., to develop the first ever Tunnel Management System to benefit both highway and rail transit tunnel owners throughout the United States and Puerto Rico. Specifically, these federal agencies, acting as ONE DOT, set a common goal to provide uniformity and consistency in assessing the physical condition of the various tunnel components. It is commonly understood that numerous tunnels in the United States are more than 50 years old and are beginning to show signs of considerable deterioration, especially due to water infiltration.

In addition, it is desired that good maintenance and rehabilitation practices be presented that would aid tunnel owners in the repair of identified deficiencies. To accomplish these ONE DOT goals, Gannett Fleming, Inc., was tasked to produce an Inspection Manual, a Maintenance and Rehabilitation Manual, and a computerized database wherein all inventory, inspection, and repair data could be collected and stored for historical purposes.

This course provides specific information for the inspection of both highway and rail transit tunnels. Although several components are similar in both types of tunnels, a few elements are specific to either highway or rail transit tunnels and are defined accordingly.

Learning Objectives

Understand the purpose and development of the Federal Highway Administration and Federal Transit Administration Tunnel Management System
Assess the physical condition of various tunnel components using standardized inspection methodologies
Differentiate between highway and rail transit tunnel components, recognizing their unique inspection and maintenance requirements
Utilize the Inspection Manual, Maintenance and Rehabilitation Manual, etc. for documenting and managing tunnel inventory, inspections, and repairs

Professional Development Hours: 5

Highway and Rail Transit Tunnel Inspection

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