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Technical Reports

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Effect of Missing or Broken Fasteners on Gage Restraint of Concrete Ties

From 2009 to 2010, the Transportation Technology Center, Inc., measured the gage restraint of a mainline concrete tie track affected by missing or broken fasteners. Measurements were taken at the Facility of Accelerated Service Testing and in revenue service. The following was discovered: 1)...

Wheel Failure Mechanisms of Railroad Cars- Interim Report

This Interim Report of the FRA sponsored Wheel Failure Mechanism Program was prepared in fulfillment of contractual requirements to provide a major mid-term technical progress report on the status of on-going research. It is not a final report, and although it does provide technical highlights and...

Vehicle Proximity Alert System: Prototype 3

As part of FRA Task Order 114, the Association of American Railroads Transportation Technology Center, Pueblo, Colorado, completed testing of Vehicle Proximity Alert System (VPAS) Prototype System 3. VPAS systems are designed to give priority vehicle operators (emergency, police, school buses,...

Urban Rail Noise Abatement Program Digest

The Urban Rail Noise Abatement Program provides a systematic approach to solving the urban transit noise problem. This approach has resulted in comprehensive scientific research and development projects, followed by extensive tests of applied technology. Program efforts have been explicitly...

Tread Metal Buildup on Railway Wheels - Dynamometer Simulation

Recent dynamometer tests on a composition metal shoe with a high metal powder content developed tread metal pick up during testing at TTC. Additionally, the brake shoes and wheels that developed tread metal buildup during these tests became magnetized. A dynamometer test matrix was created. The...

Transportation Test Center Rail Transit Services

This document describes the support facilities and technical expertise available to transit authorities and other potential users of the Transportation Test Center (TTC) located near Pueblo, Colorado. These users also are given information concerning transit test program initiation, test track...

Transit Car Demonstration Test Program On the Roll Dynamics Unit Volume I

This report documents two separate studies aimed at verifying and demonstrating the capabilities of the Roll Dynamics Unit (RDU). The RDU is part of the Rail Dynamics Laboratory (RDL), located at the Transportation Test Center (TTC). in Pueblo, Colorado. During testing, the RDU's potential for...

Top-of-Rail Lubrication Energy Test

This report presents the test results of SENTRAEN 2000™, a new top-of-rail lubrication system developed by Tanergy Corporation. The system was evaluated the week of June 2, 1997, at the Federal Railroad Administration's Transportation Technology Center (TTC) near Pueblo, Colorado. The concept of...

The UMTA Rail Transit EMI/EMC Program: An Overview and Summary

A history of the UMTA Rail Transit Electromagnetic Interference and Electromagnetic Compatibility program, together with a listing of significant achievements over the life of the program, is presented. This is the lead volume of a nin volume set dealing with the theory, problems and solutions of...