Technical Reports

Developing a Reliable Signal Wire Attachment Method

The goal of this project was to develop a better attachment method for rail signal wires to improve the reliability of signaling systems. EWI conducted basic research into the failure mode of current attachment methods and developed and tested a new process that provides improved performance over...

BNSF San Bernardino Case Study: Positive Train Control Risk Assessment

The Federal Railroad Administration funded the BNSF San Bernardino Case Study to verify its Generalized Train Movement Simulator (GTMS) risk assessment capabilities on a planned implementation of the I-ETMS PTC system. The analysis explicitly simulated a 10-year period of railroad operations....

Hazardous Material Releases Due To Unsecured Openings and Lining Failures- Volume I

In response to the large number of unintentional releases of hazardous materials from railroad tank cars for which accidents were not the cause, the Federal Railroad Administration (FRA) initiated this study to (1) recommend procedures to ensure that tank car appurtenances are properly maintained...

Residual Stress Measurements of Retrofitted Tank Car Weldments

A series of residual stress measurements were made on two tank cars that were retrofitted with stiffener beams. The measurements were made on the tank shell exterior in the vicinity of fillet skip welds, which were used to attach the stiffener beams to the tank structure. One of the cars had been...

Controlled Tank Car Impact Tests

A series of controlled tank car impact tests were performed by the Association of American Railroads as part of a Federal Railroad Administration Task Order entitled “Hazardous Materials Transportation Safety Research Test Program”. The objective of these tests, in which a weighted locomotive was...

Hazardous Materials Transportation in Tank Cars: Analysis of Risks- Part I

This report covers the development of a methodology to evaluate the potential national public risk arising from the transportation of hazardous materials in tank cars on US railroads. The analysis is intended to assess the relative changes in the overall risk when (structural) safety devices are...

FRA Tank Car Manufacturing/Repair/Retest Facility Evaluation Form

An inspection form is described to aid Federal Railroad Administration (FRA) inspectors when inspecting tank car manufacturing and repair facilities, when examining newly constructed tank cars, or when inspecting tank cars which have been repaired or retested. Instructions and background...

Temperatures, Pressures, and Liquid Levels of Tank Cars Engulfed in Fires : Volume 1, Results of Parametric Analyses

An analytical procedure has been developed for calculating the effects of fire on a railroad tank car containing a hazardous material. The procedure was developed so that the consequences of using different conductances for the thermal insulation on the tank and different flow capacities of the...

A Hybrid Active/Passive Exhaust Noise Control (APECS) for Locomotives

This report documents the analysis and development of an Active/Passive Exhaust Noise Control System (APECS) for railroad passenger locomotives that could provide at least 10 dBA noise reduction. Based on preliminary analyses and tests on actual locomotives in 1995 and 1996, a combination active...

Investigation of the Effects of Tie Pad Stiffness on the Impact Loading of Concrete Ties in the Northeast Corridor

This investigation was conducated in response to the discovery in June 1980, that rail seat bending cracks had developed in many concrete ties which had been in service on the Amtrak Northeast Corridor track for periods of a few months. The study was initiated by the Federal Railroad Administration...

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Technical Reports