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14
Feb
2020
Technical Reports
Methods for Evaluation of Track Inspection Technology Effectiveness
Subject
Track
Keywords: Correlation, receiver operating characteristics, probability of detection, repeatability, reproducibility
Abstract: Guidelines, including recommendations for sample size, are needed in the design of track inspection technology evaluation tests. This report provides and overview of...
Report Number
DOT/FRA/ORD-20/03
Office
RDI-21
10
Feb
2020
Technical Reports
Cant Excess for Freight Train Operations on Shared Track
Subject
Track
Keywords: Cant excess, cant deficiency, superelevation, shared track
Abstract: Transportation Technology Center, Inc., with Federal Railroad Administration support, conducted a study to review and summarize current practices and issues related to shared...
Report Number
DOT/FRA/ORD-20/05
Office
RDI-21
10
Feb
2020
Technical Reports
Laboratory Study of the Failure Characteristics of Fouled Ballast: Phase II
Subject
Track
Keywords: Railroad, track, substructure, ballast, fouling, water content, loading, laboratory test, box test, triaxial test, box test
Abstract: This report presents the results of a series of triaxial tests and modified box tests performed on abraded ballast at the University of Massachusetts Amherst. While Phase I...
Report Number
DOT/FRA/ORD-20/04
Office
RDI-21
2
Dec
2019
Technical Reports
Wheel Bearing Brake/Instrumented Wheelset (WBB/IWS) Friction Characterization Study
Subject
Track
Keywords: Wheel/rail interface, W/R, friction, angle of attack, AoA, traction curves, instrumented wheelset, IWS, rolling contact fatigue, wear, tribometer
Abstract: The wheel/rail (W/R) interface experiences variable friction conditions during in-service operation. This is due mainly to the application of top-of-rail friction modifiers (...
Report Number
DOT/FRA/ORD-19/46
Office
RDI-21
4
Oct
2019
Technical Reports
A Study of Environmental and Track Factors that Contribute to Abrasion Damage of Concrete Ties
Subject
Track
Keywords: Concrete ties, tie abrasion, mud pumping, ballast fouling, track drainage, track
Abstract: Kansas State University (KSU), the University of Florida, and Infrastructure Research, LLC inspected 36 railroad track sites with suspected concrete bottom tie abrasion to...
Report Number
DOT/FRA/ORD-19/38
Office
RDI-21