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52550
  
  

  9
Feb
2024
Technical Reports
Mechanistic Investigation of Timber Crosstie Spike Fastener Failures – Phase I: The Magnitude of the Spike Failure Challenge
Author
          Federal Railroad Administration

Subject
                    Track

**Keywords:**  track research, cut spikes, drive spikes, screw spikes, elastic fastening systems, failure analysis, broken spikes
**Abstract:** The Rail Transportation and Engineering Center (RailTEC) at the University of Illinois at Urbana-Champaign (UIUC) performed a literature review, conducted an industry-wide...
Report Number
              DOT/FRA/ORD-24-06

  Office
              RDI-21
    13
Sep
2023
Technical Reports
High-Strength, Reduced-Modulus, High-Performance Concrete for Prestressed Concrete Crosstie Applications
Author
          Federal Railroad Administration

Subject
                    Track

**Keywords:** Concrete, crosstie, weathered aggregate, granite, modulus
**Abstract:** High-performance concrete (HPC) with early strength development is the material of choice for fabricating prestressed concrete railroad ties. However, the higher strength of...
Report Number
              : DOT/FRA/ORD-23/26

  Office
              RPD-21
    7
Sep
2023
Technical Reports
Characterization of Track Geometry for Various Operational Conditions
Author
          Federal Railroad Administration

Subject
                    Track

**Keywords:** Track geometry, track quality, track irregularities, space curve, Automated Track Inspection Program, ATIP, Power Spectral Density, PSD, clustering
**Abstract:** This report characterizes the amplitude and wavelength content of the current track geometry environment of the United States railroad system and examines the combination of...
Report Number
              DOT/FRA/ORD-23/25

  Office
              RDI-22
    21
Aug
2023
Technical Reports
Autonomous Inspection System Based on Passive Sensing and Anomaly Detection
Author
          Federal Railroad Administration

Subject
                    Track

**Keywords:** Ballast moisture monitoring, fouled ballast monitoring, passive sensing system, frequency doubling reflectenna, sequential change detection, deep neural networks, machine learning, artificial intelligence, high-frequency electrical simulation models
**Abstract:** Detecting poor track conditions before they become safety-critical is essential for improving the safety and efficiency of railroads. To this end, autonomous track inspection...
Report Number
              DOT/FRA/ORD-23/23

  Office
              RDI-21
    11
Aug
2023
Technical Reports
Measurement and Characterization of Track Geometry Data: Literature Review and Recommendations for Processing FRA ATIP Program Data
Author
          Federal Railroad Administration

Subject
                    Track

**Keywords:** Track geometry, track quality, track irregularities, space curve, Track Quality Index, TQI, Track Geometry Measurement System, TGMS, Automated Track Inspection Program, ATIP, Power Spectral Density, PSD
**Abstract:** From October 2018 to March 2019, the Federal Railroad Administration sponsored Transportation Technology Center, Inc. to conduct a literature review on the methods of...
Report Number
              DOT/FRA/ORD-23/21

  Office
              RDI-21

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