Technical Reports

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...

Installation of Active Noise Control and Active Vibration Control on a GP40-2 Locomotive

This project evaluated the performance of active noise control (ANC) and active vibration control (AVC) technologies using a GP40-2 locomotive located at the Transportation Technology Center (TTC) near Pueblo, CO, to determine the applicability of ANC and AVC technologies in the rail industry....

Observations of In-Service Wear of Railroad Wheels and Rails Under Conditions of Widely Varying Lubrication

Some of the wheel and rail wear results from the current test at the Facility for Accelerated Service Testing are analyzed in the light of both adhesive and fatigue wear theories. This analysis suggests that the wheel:rail wear processes occurring in the unlubricated state are affected by more than...

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Technical Reports