Technical Reports

Laboratory Tests of Two 100-Ton Covered Hopper Cars

The Federal Railroad Administration (FRA) and the Association of American Railroads (AAR) have jointly sponsored an experimental program to study the 100-ton covered hopper car with the end objective of improving its safety performance. The total program includes track and laboratory testing of two...

Conductive Interference in Rapid Transit Signaling Systems, Volume I: Theory and Data

The purpose of this report is to summarize the results of a comprehensive program that has been pursued to delineate all aspects of conductive interference (Cl) in rail transit systems and to help avoid its effects in new rail transit systems. The report documents the efforts to achieve an...

Advanced Group Rapid Transit Vehicle Control Unit Design Summary

The purpose pf the Advanced Group Rapid Transit (AGRT) program was to develop an advanced automated guideway transit system capable of providing high passenger volumes, short waiting times, and high levels of passenger service. The system is the development of a transportation system consisting of...

Vehicle/Track Interaction Assessment Techniques Volume III, Part II

This report describes Vehicle/Track Interaction Assessment Techniques (IAT) which are developed to provide standardized procedures and tools in order to investigate the dynamic performance of railroad vehicles, and systematically identify and cure dynamic track interaction problems associated...

Vehicle/Track Interaction Assessment Techniques Volume II, Part II

Vehicle/Track Interaction Assessment Techniques Volume I, Part I

This report describes Vehicle/Track Interaction Assessment Techniques (IAT) which - are developed to provide standardized procedures and tools in order to: Investigate the dynamic performance of railroad vehicles, and systematically identify and cure dynamic track interaction problems associated...

Validation of Track Geometry Input to the Vibration Test Unit (VTU) and the Endurance Capability of the VTU

This report describes a series of tests conducted at the Transportation Test Center, Pueblo, Colorado, to validate two forms of track geometry inputs to the Vibration Test Unit (VTU) in the Rail Dynamics Laboratory, capable of reproducing actual revenue track conditions. The first form consisted of...

Tank Car Damage Assessment Procedure Study

The study concerns the rupture of damaged tank cars which have been involved in railroad accidents. In this regard, a series of impact tests using the FRA/BRL Drop Hammer Facility was performed. The tests consisted of the creation of controlled damage to flat steel plates which had properties...

Strain-Life Fatigue Analysis

The strain-life approach to characterize the fatigue behavior of materials and its applications to railroad equipment design have been investigated. A logical means of accounting for local plastic strains, which are the cause of fatigue failures, has been given, and constitutive relations between...

Safety Margin Testing of a 70-Ton Boxcar with Shifting Plywood Lading: Test Results Data

Tests were performed at the Transportation Test Center, Pueblo, Colorado, in a joint Association of American Railroads (AAR) and Federal Railroad Administration (FRA) effort in the April-May-June period of 1982. AAR objectives were to perform a "pilot" test on the Vibration Test Unit (VTU) as a...

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Technical Reports