General

Railroad Electrification Activity: A Summary Report, 1980-1981

This report reviews the status of railway electrification in North America and selected countries worldwide, for the period June, 1980 through June, 1981. Included in the report are updates on the extent of construction of electrification; research completed on feasibility studies and technical...

Radial Axle Truck Test Results Report

This report describes the performance tests conducted on a pair of prototype radial axle trucks developed by GSI. The trucks tested were purchased from GSI by Amtrak and tested by FRA as a joint FRA/Amtrak project. The results of this test show that, as configured for this test, the trucks...

Radial Axle Passenger Truck Evaluation: Life Test Results and Vehicle Performance Problems

A pair of prototype radial-axle passenger trucks was tested at the Transportation Test Center, Pueblo, Co. With steering cross-links to provide yaw-angle compliance and axle stability, these trucks can execute axle radial alignment when negotiating curves; primary suspension is made up of separate...

Prediction of Rail Buckling - Recommendations for Development of Test Methods

Railroad track structure can buckle if excessive compressive force is developed due to a temperature increase. The resulting misalignment can be a significant cause of train accidents. There is no practical method for measuring the longitudinal force without disturbing the track. Physical phenomena...

Post Accident Procedures for Chemicals and Propellants

This report presents production volumes, storage capacities, shipment quantities, containers used for highway and rail shipments, general commodity flow patterns and disposal sites and capabilities for 16 hazardous materials; an overview of emergency response guidelines and resources available to...

Mechanics of Ballast Compaction Volume 1: Technical Review of Ballast Compaction and Related Topics

The purpose of the research program on the mechanics of ballast compaction is to determine the influence of mechanical compaction on the ballast physical state and its consequence on the performance of the track structure. This report, which is one of a series for this project, presents the results...

Mechanics of Ballast Compaction Volume 5: Summary Report

This report summarizes the results of research on the mechanics of ballast compaction. Details are provided in four preceding reports. The scope of this summary includes: 1) a description of ballast physical state, 2) methods developed for measuring the physical state in-situ, 3) the effects of...

Mechanics of Ballast Compaction Volume 4: Laboratory Investigation of the Effects of Field Compaction Mechanics

This report describes a preliminary series of laboratory tests which attempt to simulate some of the effects of maintenance procedures and traffic on the physical state of ballast as measured by the ballast density test, plate load test, and lateral tie push test. The first part of the report...

Mechanics of Ballast Compaction Volume 3: Field Test Results for Ballast Physical State Measurement

The important mechanical processes which influence the ballast physical state in track are tamping, crib and shoulder compaction and train traffic. Three methods of assessing physical state were used at four railroad sites to obtain needed data on the effect of these processes. The methods were:...

Mechanics of Ballast Compaction: Field Methods for Ballast Physical State Measurement

Field methods for measuring ballast physical state are needed to study the effects of ballast compaction. Following a consideration of various alternatives, three methods were selected for development and evaluation. The first was in-place density, which provides a direct measure of compaction. An...

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General