Technical Reports

Demonstration of the Budd Company Amcoach Tilt Body System

The objective of this program was to demonstrate the Tilt System developed by The Budd Company. This system is applicable to any corridor and it will provide the most cost effective method of reducing trip times on the Northeast Corridor by allowing higher travel speeds on existing curves while...

Data Analysis Results of 70 Ton Boxcar Vibration Tests

This is the second of three volumes covering tests performed in April and May of 1981 at the Transportation Test Center (TTC) in Pueblo, Colorado on a 70 ton boxcar with Barber S-2-C trucks. The objective of the testing was to define the dynamic properties of the freight car for use in validating a...

Cold Weather Transit Technology Program - Investigation of the High Incidence of Rail Pull Aparts on Continuous Welded Rail

This report presents the results of an investigation of the high incidence of rail pull aparts occurring on the Massachusetts Bay Transit Authority's rapid transit system during the winter of 1981-82. This investigation was accomplished as part of the Cold Weather Transit Technology (CWTT) Program...

Ballast and Subgrade Requirements Study: Summary and Assessment Report

Earth materials - i.e. soil and rock - form the substructure of all railroad track. In this report a summary and assessment is presented with respect to current and available practices for substructure (ballast, subballast, and subgrade) materials evaluation and selection, stabilization, design and...

Analytic Studies of the Relationship Between Track Geometry Variations and Derailment Potential at Low Speeds

This report describes analytical studies carried out to define the relationship between track parameters and safety from derailment. Problematic track scenarios are identified reflecting known accident data. Vehicle response is investigated in the 10-25 mph speed range, using an analytic model of a...

A Model for Evaluating the Costs and Benefits of Railroad Electrification, Volume I - Model Description and Application

A model has been developed to evaluate the economic benefits of large scale railroad electrification. Site specific factors which have a major impact on the rate-of-returns are included as input data, thus providing a procedure for comparing the economics of individual routes in a uniform and...

User's Manual for Program CONWHEEL (CONformal WHEEL-rail Contact Stress Problems): Technical Report No.10

CONWHEEL (CONformal WHEEL-rail contact stress problems) is an all FORTRAN computer program for the solution of normal contact stresses between two closely conforming (possibly nonHertzian) smooth elastic bodies. It can be used to determine: the boundary of the interface contact region; pressure...

User's Guide for a Computerized Track Maintenance Simulation Cost Methodology

This User s Guide describes the simulation cost modeling technique developed for costing of maintenance operations or track and its component structures. The procedure discussed provides for separate maintenance cost entries to be associated with definable track substructures such as rail, cross...

Truck Design Optimization Project (TDOP) Phase II: Final Report

The overall objectives of the TDOP Phase II are to provide technological and economic bases for assessing freight car truck performance and design, and to generate uniform testing and performance guidelines for truck/carbody systems. This report summarizes the approaches employed in this study...

Track Component Property Tests Volume II: Rails, Ties, Joint Bars and Fasteners

This report describes the test procedures and results from a series of tests on the physical properties of concrete ties, rails, joint bars and rail fasteners, conducted at the Association of American Railroad's Track Research Laboratory in Chicago, Illinois. The properties investigated were:...

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Technical Reports