General

Exploratory Soil Borings at Two Locations for the U.S. Department of Transportation

Exploratory borings and soil classification studies are reported on for two locations; southeast Kansas and northeast New Mexico. The object of the work was the revelation of sufficient sub-soil information to enable a decision on the part of the sponsoring agency as to where to most...

Evaluation of Squeal Noise from the WMATA Transit Car Disc Brake System: A Preliminary Investigation

This study was conducted as part of the Urban Rail Noise Abatement Program sponsored by the Office of Rail and Construction Technology of the Urban Mass Transportation Administration. The Washington Metropolitan Area Transit Authority (WMATA) rail transit car design adopted the use of disc brakes...

Evaluation and Service Testing of Prototype Empty/Load Brake Device to Reduce Wheel Spalling Due to Slide

The Transportation Technology Center, Inc. and New York Air Brake evaluated a prototype three-step graduated empty and load (E/L) brake device to reduce wheel spalling due to wheel slide on intermodal double-stack railcars. Analysis of the results showed an increase in the rate of wheel spalling on...

Electronically Controlled Pneumatic Brake Revenue Service Tests

This letter report, prepared by the Transportation Technology Center, Inc. (TTCI), Pueblo, Colorado, a subsidiary of the Association of American Railroads (AAR), summarizes the findings of the service testing of Electronically Controlled Pneumatic (ECP) Brakes, carried out between the spring of...

Effect of Track Twist on Vehicle Dynamic Performance

Results of tests conducted at the Transportation Technology Center (TTC), Pueblo, Colorado, indicate that vehicle response to track twist varies significantly with car type. Critical response variables include car body torsional stiffness, truck spacing, track alignment (tangent or curve), track...

Effect of Hollow-Work Wheels on Wheel and Rail Interaction with North American Freight Cars

This report examines the effect that hollow-worn wheels have on wheel and rail interaction for typical North American freight cars on tangent and curved track. Hollow wear tends to reduce the speed of which hunting starts and can increase the rail roll moment. However, hollow wear is not the sole...

Effects of Coupler Height Mismatch on the Structural Integrity of Railroad Tank Car Stub Sills

This project evaluated the safety implications of coupler height mismatches on the integrity of railroad tank car stub sills, through a series of static and impact tests. The test car was a loaded tank car instrumented with strain gages at critical locations. Static tests consisted of squeeze tests...

Potential Means of Cost Reduction in Grade Crossing Motorist-Warning Control Equipment Volume I: Overview, Technology Survey and Relay Alternatives

The results of a recent study of railroad-highway grade crossing warning system technology are presented. Emphasis in the investigation was placed on the determination of the potential for significant reduction in equipment, installation and maintenance costs through improvements sought within...

Innovative Concepts and Technology for Railroad-Highway Grade Crossing Motorist Warning Systems Vol. II: The Generation and Analysis of Alternative Concepts

This report describes the results of a study directed toward the generation, analysis and evaluation of innovative conceptual and technical approaches to train-activated motorist warning systems for use at railroad-highway grade crossings. Particular attention is given to the use of the track as a...

Innovative Concepts and Technology for Railroad-Highway Grade Crossing Motorist Warning Systems, Volume I: Overview and Concept Generation and Analysis

This document includes a general review of innovative conceptual and technical approaches to train-activated motorist warning systems for use at railroad-highway grade crossings, and also contains a specific report describing a study directed toward the generation, analysis and evaluation of...

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General