Research Report and Findings: Review of Specifications and Guidelines for Rail Tunnel Repair and Rehabilitation
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2022-11-01
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Edition:September 2018–May 2019
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Abstract:After the Washington Metropolitan Area Transit Authority (WMATA) L’Enfant Station rail accident in 2015, the National Transportation Safety Board (NTSB) issued two recommendations—1) Recommendation R-16-01: Issue regulatory standards for tunnel infrastructure inspection, maintenance, and repair, incorporating applicable industry consensus standards into those standards, and 2) Recommendation R-16-02: Issue regulatory safety standards for emergency egress in tunnel environments. To effectively respond to NTSB’s recommendations, this report was prepared to assist the transit industry in developing standards and/or recommended practices to address Recommendation R-16-02 – tunnel repairs and rehabilitation and includes a condition-based rating system for tunnels as a tool for evaluation for rehabilitation and guidelines for a tunnel inventory database.
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