General

Experimental Investigations of Dynamic Buckling of CWR Tracks

Thermal Buclking of railroad tracks in the lateral plane is an important problem in the design and maintenance of continous welded rail (CWR) tracks. The severity of the problem is mainfested through the large number of derailments which are attributable to track buckling, indicating a need for...

Determination of Residual Stresses in Rails

A destructive sectioning technique for measuring the complete three-dimensional residual stresses in a rail cross section was developed. The technique was applied to four tangent rail specimens: two 136-pound specimens were taken from FAST (Facility for Accelerated Service Testing), Pueblo,...

Computational Methods to Predict Railcar Response to Track Cross-Level Variations

The rocking response of railroad freight cars to track cross-level variations is studied using: (1) a reduced complexity digital simulation model, and (2) a quasi-linear describing function analysis. The reduced complexity digital simulation model employs a rail truck model that neglects the high-...

The Effect of Imperfections on the Vertical Buckling of Railroad Tracks

This report deals with an analytical prediction of the effect of geometric imperfections on the post-buckling characteristics of railroad tracks. The analysis is restricted to the case of vertical track buckling due to constrained thermal expansion in which the track is assumed to lift itself up...

Notices of Adjustment of National Significant Risk Threshold

Training Requirements for Railroad Dispatchers: Objectives, Syllabi and Test Designs

This report presents the results of a study to develop railroad dispatcher training objectives, syllabi for three types of training programs and test designs for the three programs. Information about current railroad dispatching methods and training programs, assembled through site visits and...

Feasibility Study on the Replacement or Upgrade of the T-6 Track Research Vehicle

This feasibility and cost study concluded that the FRA's aging T-6 can be replaced with a new state-of-the-art research platform costing approximately 3.5 million. The new, Track Research Instrumentation Platform (TRIP) is envisioned as a laboratory on wheels. This vehicle will provide: the means...

Ride Quality Evaluation of High Speed Trains on the Northeast Corridor

This document contains the results of testing to characterize the ride quality of high speed rail passenger vehicles. The lateral and vertical acceleration and vibration of standard Amtrak Metroliners, the Swedish X2000, and the German Intercity Express (ICE), were recorded during simulated and...

Safety of High Speed Guided Ground Transportation Systems: Potential Health Effects of Low Frequency Electromagnetic Fields Due to Maglev and Other Electric Rail Systems

The safety of magnetically-levitated (maglev) and high-speed rail (HSR) trains proposed for use in the United States is the responsibility of the Federal Railroad Administration. There are concerns for physical safety associated with equipment operation and high-voltage currents, and for potential...

Fire Safety of Passenger Trains: A Review of U.S. and Foreign Approaches

While the historical record has been very good and few serious passsenger train fires have occurred, minor incidents could develop into potentially life-threatening events. Fire safety is an area of particular interest for both conventional intercity and commuter trains, as well as new high-speed...

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General