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Small Scale Impact Simulation Tests

In derailments and switchyard operations, tank cars frequently experience impacts that result in tank car head puncture. From a cost effective viewpoint, it is not practical to conduct many full-scale testing to verify that a particular tank car design will perform satisfactorily in all possible...

Nondestructive Measurement of Longitudinal Rail Stresses (Interim Report)

A study of the effect of applied stress on the wave velocity (acoustoelasticity) of railroad rail steel has shown that a potentially useful technique exists for the nondestructive measurement of longitudinal stresses. The detection of extreme stress levels would contribute toward increased rail...

“The State of Positive Train Control Implementation in the United States”

ORAL STATEMENT OF SARAH FEINBERG ACTING ADMINISTRATOR, FEDERAL RAILROAD ADMINISTRATION U.S. DEPARTMENT OF TRANSPORTATION BEFORE THE COMMITTEE ON TRANSPORTATION AND INFRASTRUCTURE, SUBCOMMITTEE ON RAILROADS, PIPELINES, AND HAZARDOUS MATERIALS U.S. HOUSE OF REPRESENTATIVES “The State of...

Influence of Vehicle Induced Loads on the Lateral Stability of CWR Track

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

Ballast and Subgrade Requirements Study: Railroad Track Substructure – Design and Performance Evaluation Practices

Earth Materials- i.e., soil and rock- form the substructure (ballast, subballast, and subgrade) of all railroad track. In this report, the most suitable technology and design criteria as related to design of the substructure are identified based on a review of current track substructure design...

Ballast and Subgrade Requirements Study: Railroad Track Substructure – Materials Evaluation and Stabilization Practices

Earth materials--i.e., soil and rock--form the substructure of all railroad track. In this report, the functions and performance characteristics of each of the substructure elements (i.e., ballast, subballast, and subgrade), and the material properties that influence the substructure performance...

Analysis of Thermal Buckling Tests on U.S. Railroads

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

Special Routing of Spent Fuel Shipment Study

Special rail routing of spent fuel shipments from commercial nuclear power plants away-From-Reactor (AFR) storage and disposal sites has been proposed as one means of reducing the consequences and severity of radioactive materials accidents in areas of high population density. Whether or not...

Engineering Data Characterizing the Fleet of U.S.Railway Rolling Stock Volume I: User Guide

This report contains engineering parameter descriptions of major and distinctive freight vehicle configurations covering approximately 96% of the U.S. freight vehicle fleet. This data has been developed primarily for use in analytical simulation modeling of rail vehicles to analyses of vehicle/...

A Metallurgical Evaluation of two AAR M128 Steel Tank Car Head Plates Used in Switchyard Impact Tests

The National Bureau of Standards correlated the mechanical properties and metallurgical characteristics of two steel head plate samples taken from tank cars subjected to switchyard impact tests. This metallurgical evaluation included determining whether the samples conformed with the appropriate...

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