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HAL Substructure Investigation Using Rapid, Non-Destructive Techniques

As part of a program to determine the nature of track substructure problems and to recommend the best remedial action, the Association of American Railroads has developed an on-track vehicle which houses a rapid, non-destructive subgrade test apparatus known as a cone penetrometer. Although still...

FAST Heavy Axle Load Program Safety Compendium

[From the Introduction] The Federal Railroad Administration (FRA) and the Association of American Railroads (AAR) have jointly funded research activity at the Facility for Accelerated Service Testing (FAST) to study the effects of increasing the nominal North American railroad axle load from 33-...

Technical Documentation: 2, 3, & 4 Axle Rigid Truck Curve Negotiation Model

[From the Introduction] An understanding of curve negotiation mechanics is vital from the standpoint of learning of the design and operating parameters that result in decreases and increases in the lateral reaction occurring between the wheel flange and rail, for it is this lateral load that...

Vision for High-Speed Rail in America

In order to meet the goals of the Recovery Act while initiating a transformational new program, we propose to advance three funding “tracks”: Projects. Provide grants to complete individual projects that are “ready to go” with preliminary engineering and environmental work completed; Corridor...

Baltimore's Railroad Network: Challenges and Alternatives

In November 2001, the Congress requested “a comprehensive study to assess problems in the freight and passenger rail infrastructure in the vicinity of Baltimore, Maryland.” In particular, the study was to analyze the condition and capabilities of the railways’ fixed facilities and “examine the...

Development of a Distance Based Criterion for Flange Climbing Derailment

A bi-parameter flange climbing distance criterion is developed for vehicles with AAR-IB wheels running on a new AREMA 136 RE rail. The two parameter that affect flange climbing distance are angle of attack and lateral to vertical force ratios.

Comparative Safety of the Transport of High-Level Radioactive Materials on Dedicated, Key and Regular Trains

This study compares the risks in transporting spent nuclear fuel and high-level radioactive waste under three rail shipment alternatives: 1) regular train service, operating without restrictions with the exception of current hazardous materials regulations; 2) dedicated train service, operating...

Instrumented Wheelset Test: Material Handling Cars in Service from New York City to Chicago

Vehicle performance tests were conducted on empty 1400-series Amtrak Material Handling Cars (MHC) from Albany, New York, to Chicago, Illinois. TTCI used its 33-inch instrumented wheelsets, accelerometers, and data acquisition and analysis system to collect the vehicle performance data. In order to...

Study of Bridge Approach and Track Transition Degradation: Factors and Mitigation

Efforts have been made to reduce or eliminate track geometry degradation at bridge approaches and special trackwork zones for more than a century. This is a common problem that has been reported by railroads in North America, Europe, Asia, South America, and Australia. The objective of this report...

Review and Evaluation of Track Designs for Joint High Speed Rail and Heavy Freight Operations

An increasing number of railway track segments in the U. S. will soon be required to carry both high-speed passenger and heavy freight traffic. In some cases, conventional track structures (i.e., ballasted crosstie tracks) may not be adequate for both types of service. They may not be capable of...

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