Technical Reports

Nucars Modeling in Support of Freight Car Tolerance Side Bearing Clearance Test

The objective of this investigation was to support previous (1993) on-track testing and analystical modeling to further determine the effect of side bearing clearance in the presence of various secondary suspension configurations on high c.g. cars. Further parameters investigated were track gage,...

Noise Test-Resilient Wheels Massachusetts Bay Transportation Authority Green Line

The purpose of this effort was to compare the noise and vibration characteristics of the Sab-V resilient wheels with those of Acoustaflex (resilient) and solid-steel wheels, which are both in current use on the Green Line of the Massachusetts Bay Transportation Authority (MBTA). Noise and ground -...

Noise Assessment and Abatement in Rapid Transit Systems

As Systems Manager for the Urban Rail Supporting Technology Program sponsored by the Rail Programs Branch of the Urban Mass Transportation Administration, the Transportation Systems Center is conducting an effort in Urban Rail Noise Abatement. A portion of this effort, described herein, is...

Niagara Frontier Transportation Authority Vehicle Tests

A prototype single car, intended for use on revenue (Niagara Frontier Transportation Authority - NFTA) line in Buffalo, New York, was tested over a twelve-week period by the Association of American Railroads (AAR). Testing at the Transportation Test Center (TTC) in Pueblo, Colorado, was sponsored...

Parametric Study of Track Response

This report was prepared as part of the Improved Track Structures Research Program managed by the Transportation Systems Center. This program is sponsored by the Office of Rail Safety Research, Improved Track Structures Research Division, of the Federal Railroad Administration. The report...

Measurement of Wheel/Rail Forces at the Washignton Metropolitan Area Transit Authority : Volume I. Analysis Report

Under the direction of the Urban Mass Transportation Authority (UMTA) measurements of wheel/rail forces were made in August 1979 by the Transportation Systems center (TSC) with the assistance of the Battelle Columbus Laboratories to determine the causes of excessive wheel/rail wear experienced by...

Integrated Railway Remote Information Service

TTCI via the FRA was tasked by the Congress of the United States to demonstrate the feasibility of using and linking defect detector systems across North America to develop a national database that will enable the railroad industry to engage in predictive maintenance (processes that allow...

Initial Assessment of the Technical Feasibility and Potential Cost Savings of a Lower-cost Positive Train Control Activated Crossing

The overall objective of this project was to improve safety at the HRIs. The approach used to achieve the objective was to (1) increase the proliferation of constant warning time HRIs by reducing the cost of radio-based HRI technology and (2) increase the reliability of radio-based HRIs by reducing...

Full-Scale Single Car Multilevel Car Test- Test No. 9 Procedures, Instrumentation, & Data

This report addresses the efforts to document the behavior of an existing design multilevel passenger car as it impacts a stationary wall at approximately 36 mph. Transportation Technology Center, Inc.'s (TTCI) role was to instrument the vehicle per FRA direction, conduct the testing, report on the...

Friction and Creep in Rolling Contact

Experimental and analytical studies of friction and creep in rolling contact are reported. Factors examined for their influence on friction (adhesion) and creep are (a) surface roughness, (b) surface vibration, (c) surface contamination, (d) dynamic loading due to irregular track, and (e)...

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Technical Reports