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4
Apr
2014
Technical Reports
Quantification of the Effectiveness of Handheld Equipment for Ground Verification of Detected Rail Internal Defects
Subject
Rail and Infrastructure Integrity,
Track,
Tracks & Structures
Keywords: Ultrasonic phased arrays, conventional ultrasonic, rail flaw sizing, nondestructive testing
Abstract: The objective of this project was to quantify the effectiveness of the rail inspection ground verification process. More specifically, the project focused on comparing the...
Report Number
DOT/FRA/ORD-14/07
Office
RRD
3
Apr
2014
Technical Reports
Start Time Variability and Predictability in Railroad Train and Engine Freight and Passenger Service Employees
Subject
Human Factors,
Work Schedule & Sleep Patterns
Keywords: Work schedules, start time variability, fatigue, train and engine service, accident probability, FAST
Abstract: Start time variability in work schedules is often hypothesized to be a cause of railroad employee fatigue because unpredictable work start times prevent employees from planning...
Report Number
DOT/FRA/ORD-14/05
Office
RRD
21
Mar
2014
Technical Reports
Performance Evaluation of Concrete Railroad Ties on the Northeast Corridor
Subject
Track,
Tracks & Structures
Keywords: Concrete railroad ties, alkali-silica reaction (ASR), delayed ettringite formation (DEF), impact echo, material analysis, prestressing tendons, degradation mechanisms, petrographic analyses, bursting and splitting forces, transfer strength and length
Abstract: Simpson Gumpertz & Heger Inc. conducted an investigation into the factors that caused widespread failure in prestressed concrete railroad ties on the Northeast Corridor. The...
Report Number
DOT/FRA/RPD-14/03
Office
RRD
8
Jan
2014
Other Reports
Characterization of Locomotive Engineer Schedules
Subject
Human Factors,
Worker Protection,
Work Schedule & Sleep Patterns
Keywords: Characterization of Locomotive Engineer Schedules; work
Report Number
DOT/FRA/ORD-14/01
Office
RRD
18
Oct
2013
Technical Reports
Feasibility Study of Fiber-Optic Technology for Broken Rail Detection
Subject
Rail and Infrastructure Integrity,
Track,
Tracks & Structures
Keywords: Fiber Optic, Broken Rail, Acoustic, Seismic, Rail Break, Wayside Systems
Abstract: This report describes the activities and presents the results of a feasibility study to examine the viability of using fiber-optic acoustic technologies to detect broken rails in...
Report Number
DOT/FRA/ORD-13/44
Office
RRD