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Design of Tunnel Liners and Support Systems

Contents: Introduction; Fundamentals of tunnel support design; Existing theories, design methods, and practices; Tunnel support systems in soil and soft rocks; Tunnel support systems in rock--Factors influencing behavior; Tunnel support systems in rock--Design procedures; Potential developments of...

Analysis of Optimum and Preview Control of Active Vehicle Suspensions

The analysis leading to the optimum transfer function for an active suspension excited by a random guideway input is briefly reviewed and a design chart is presented. A parameter sensitivity study of the stability is performed and shows excellent system stability. The wheel-guideway contact problem...

The Importance of Effective On-Track Safety Briefings

Following the implementation of the Roadway Worker Protection (RWP) Rule in 1997, there have been a total of 42 fatal RWP accidents, in which 44 roadway workers have perished, as of December 31, 2011. The FAMES Committee was able to obtain data to analyze 39 fatal RWP accidents, which accounted...

Benefit-Cost Analysis Guidance for Rail Projects

This guidance document is intended to provide a consistent approach for completing a benefit-cost analysis (BCA) for passenger and freight rail project proposals. The systematic process of identifying, quantifying, and comparing expected benefits and costs helps decision-makers organize information...

Positive Train Control Desense Mitigation Test: Research Phase 1

Final report for Positive Train Control (PTC) Desense Mitigation Test Research project includes description of Northeast Corridor (NEC) PTC deployments, PTC radio desense scenarios, PTC radio desense mitigation approaches, PTC radio desense mitigation trade study, and recommendations. The trade...

Probability of Detection Evaluation Results for Railroad Tank Cars

The Transportation Technology Center, Inc. (TTCI) used the approach developed for the National Aeronautics and Space Association to determine the probability of detection (POD) for various nondestructive test (NDT) methods used during inspection of railroad tank cars. The Federal Railroad...

Hudson Tunnel Project Environmental Impact Statement Scoping Document

The Federal Railroad Administration (FRA) and NJ TRANSIT are preparing an Environmental Impact Statement (EIS) to evaluate the Hudson Tunnel Project (the “Proposed Action” or the “Project”). The Proposed Action is intended to preserve the current functionality of the Northeast Corridor’s (NEC)...