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5
Aug
2024
Reports
Relationship of Inspection Methods to Ballast Degradation Models: Phase II
Subject
Tracks & Structures
Keywords: Ballast; settlement; mud pumping; fouling index; forecasting; track inspection; track modulus; track; Railway Track Lifecycle Model; RTLM
Abstract:
This report is a follow on of the first phase of a Federal Railroad Administration (FRA)-sponsored project to evaluate lateral ballast behavior and how mechanics-based track...
11
Jun
2024
Technical Reports
Performance-Based Specifications for Concrete Railroad Tie Freeze-Thaw Durability
Subject
Tracks & Structures
Keywords: Concrete railroad ties, freeze-thaw durability, manufacturing process control
Abstract: The University of Florida and the University of Illinois at Urbana-Champaign, in partnership with the Austrian firm voestalpine Railway Systems Nortrak, developed a performance...
Report Number
DOT/FRA/ORD-24/17
Office
RDI-21
3
Jun
2024
Technical Reports
A 3D Scanning Method to Measure Concrete Crosstie Geometry
Subject
Tracks & Structures
Keywords: infrastructure, railroad ties, 3D scanning, tie cross-section parameters, transfer length, shape factor, prestressed concrete, high speed rail
Abstract: The Federal Railroad Administration sponsored Kansas State University (K-State) in research to improve the design and performance of crossties. K-State used a Creaform...
Report Number
RR 24-05
Office
RDI-21
17
May
2019
Technical Reports
Effects of In-Pavement Lights on Driver Compliance with Grade Crossing Safety Equipment
Subject
Accident Reduction,
Grade Crossing Technology,
Highway-Rail Grade Crossing Warning Systems,
Highway-Rail Grade Crossings
Keywords: Highway-rail, grade crossing, pedestrian behavior, trespass, enhancement, safety, in-pavement lights, violations
Abstract: This study examined whether in-pavement lights installed at a single grade crossing would increase the number of drivers who obey grade crossing safety signals.
Report Number
DOT/FRA/ORD-19/10
Office
RDI-23
10
May
2019
Research Results
Determining Bond-Slip Characteristics of Prestressing Tendons with Varying Geometries in Two Concrete Mixtures
Subject
Tracks & Structures
Keywords: Track, ties, concrete, bond-slip, prestressing tendons
Abstract: Untensioned pullout tests were conducted to obtain the bond-slip characteristics of two groups of prestressing tendons used in concrete railroad tie production. The purpose of...
Report Number
RR 19-13
Office
RDI-21