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18
Feb
2020
Technical Reports
Relationship Between Track Geometry Defects and Measured Track Subsurface Condition
Subject
Track
Keywords: Railroad, track, track geometry, Ground Penetrating Radar, GPR, big data, ballast fouling index, BFI, ballast layer thickness, BLT, Logistic Regression, LR, research, study
Abstract: This report presented the results of a comprehensive study regarding the development of a probability model for occurrence of track geometry defects as a function of key...
Report Number
DOT/FRA/ORD-20/07
Office
RDI-21
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