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Federal Railroad Administration

rosaP Repository & Open Science Access Portal

The Federal Railroad Administration (FRA) promotes safe and environmentally sound rail transportation. The FRA conducts research and development tests to evaluate projects in support of its safety mission and to enhance the railroad system as a national transportation resource. Public education campaigns on highway-rail grade crossing safety and the danger of trespassing on rail property are also administered by FRA. Bookmark this collection https://rosap.ntl.bts.gov/collection_fra or https://doi.org/10.21949/1530835.

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Showing 321 - 340 of 1162 results
  • Impact Test Data Analysis for Load Environment Characterization of Tank Car Stub Sill During Yard Operations
    Impact Test Data Analysis for Load Environment Characterization of Tank Car Stub Sill During Yard Operations
    Meymand, Sajjad
    2020-03-01 | PDF
    Fractures in the stub sills of tank cars pose a significant problem for the rail industry due to the potential for damage to the tank structure and eventual release of the contents. Previous research by the Federal Railroad Administration (FRA) revealed that high magnitude coupling forces that occur in yard operations have the potential to exceed y ...
  • Wireless Digital Train Line for Passenger Trains
    Wireless Digital Train Line for Passenger Trains
    Sharif, Hamid
    2020-03-01 | PDF
    This research project evaluated current wireless communication standards used by high-speed passenger rail services around the globe and determined, based on those findings, an architecture design suitable for U.S. high-speed rail implementations that addresses application requirements, overcomes limitations, and unifies several disparate communica ...
  • Positive Train Location EndofTrain Final Report
    Positive Train Location End-of-Train Final Report
    Gage, Scott ;
    Polivka, Alan
    2020-03-01 | PDF
    The overall goal of the Positive Train Location (PTL) end-of-train (EOT) project was to build on the successes of the PTL Phase II project and further refine the use cases, review/modify PTL EOT segment requirements, and identify a path forward for addressing technical issues from the previous phase. Refined use cases and modified segment requireme ...
  • Validation of a 70ton Higher Speed Freight Truck Design Phase II
    Validation of a 70-ton Higher Speed Freight Truck Design: Phase II
    Singh, Som P. ;
    Brabb, David C.
    2020-03-01 | PDF
    Previously, Phase I of this project demonstrated viable market potential and operating economics for high speed freight service, and established that the higher speed truck (HST) prototype design is capable of meeting the dynamic and structural requirements expected in higher speed freight operations. In Phase II, the design was evaluated through f ...
  • Railroad Wireless Communications Roadmap
    Railroad Wireless Communications Roadmap
    Ramos, Aaron ;
    Gacnik, Jill
    2020-03-01 | PDF
    The Federal Railroad Administration (FRA) sponsored a project conducted by Transportation Technology Center, Inc. (TTCI) to analyze railroad wireless communication needs and future uses. TTCI examined the railroads’ general wireless communication needs and future uses, and analyzed in further detail the railroads’ wireless needs in a representative ...
  • FullScale Shell Impact Test of a DOT113 Tank Car
    Full-Scale Shell Impact Test of a DOT-113 Tank Car
    Gonzalez, Francisco
    2020-02-01 | PDF
    FRA has an established program to evaluate the puncture resistance of various tank car designs. This program supports examining strategies to lower the potential for loss of lading of tank cars involved in derailments. FRA seeks to develop standardized test and simulation methodologies for quantifying the puncture resistance of tank car designs. Th ...
  • Laboratory Study of the Failure Characteristics of Fouled Ballast Phase II
    Laboratory Study of the Failure Characteristics of Fouled Ballast: Phase II
    Rohrman, Andrew K. ;
    Ho, Carlton L.
    2020-02-01 | PDF
    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 involved the same tests performed on highly angular ballast, this phase is broken into two parts: Phase IIa and IIb. Both parts use ballast taken from a rail line in Shelburne F ...
  • Evaluation of Risk Acceptance Criteria for Transporting Hazardous Materials
    Evaluation of Risk Acceptance Criteria for Transporting Hazardous Materials
    Ehrhart, Brian D. ;
    Brooks, Dusty
    2020-02-01 | PDF
    This report reviews and offers recommendations from Sandia National Laboratories of risk acceptance criteria for the transportation of hazardous materials in the U.S. The risk criteria should be used with the results of a quantitative risk assessment (QRA) in risk acceptance decision-making. The QRA for transportation risk is fundamentally the same ...
  • Ballast Fouling Measurement Tool Phase II
    Ballast Fouling Measurement Tool – Phase II
    Oden, Charles P ;
    Ho, Carlton L.
    2020-02-01 | PDF
    Researchers developed a second-generation RAdar Ballast Inspection Tool (RABIT) using ground-penetrating radar (GPR) for use by track inspectors. This system is much lighter (26 lbs/11.8 kg) than its predecessor (63 lb/29 kg) and is truly portable. It has a single bi-static antenna pair that straddles the tie so the ballast properties under the tie ...
  • Relationship Between Track Geometry Defects and Measured Track Subsurface Condition
    Relationship Between Track Geometry Defects and Measured Track Subsurface Condition
    Zarembski, Allan M. ;
    Yurlov, Dennis
    2020-02-01 | PDF
    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 subgrade parameters, measured by Ground Penetrating Radar (GPR). The analysis used multiple track geometry runs and the associated track geometry degradation behavior combined with ...
  • Methods for Evaluation of Track Inspection Technology Effectiveness
    Methods for Evaluation of Track Inspection Technology Effectiveness
    Bruzek, Radim ;
    Maymand, Sajjad
    2020-02-01 | PDF
    Guidelines, including recommendations for sample size, are needed in the design of track inspection technology evaluation tests. This report provides and overview of recommended methods for evaluating the effectiveness of different types of track inspection systems. These methods produce performance measures that can be used to validate the technol ...
  • Cant Excess for Freight Train Operations on Shared Track
    Cant Excess for Freight Train Operations on Shared Track
    Rakoczy, Anna M. ;
    Wilson, Nicholas
    2020-02-01 | PDF
    Transportation Technology Center, Inc., with Federal Railroad Administration support, conducted a study to review and summarize current practices and issues related to shared operations—particularly freight train operations on curves with cant excess. Shared-track curve design requires a compromise between higher-speed passenger and lower-speed fre ...
  • Trespasser Detection Systems on Railroad RightsofWay
    Trespasser Detection Systems on Railroad Rights-of-Way
    Baron, William R. ;
    da Silva, Marco P.
    2020-01-27 | PDF
    The U.S. Department of Transportation’s Volpe Center, under the direction of DOT’s Federal Railroad Administration Office of Research, Development, and Technology, conducted a research study to evaluate the effectiveness of trespass detection technology on rail property linked to and controlled by a local police department. The system was operated ...
  • Seismic Performance of Stone Masonry and Unreinforced Concrete Railroad Bridge Piers
    Seismic Performance of Stone Masonry and Unreinforced Concrete Railroad Bridge Piers
    Gui, Qiang ;
    Ma, Z. John
    2020-01-09 | PDF
    Numerous railroad bridge structures in the United States were constructed more than 100 years ago. With railroad infrastructure aging quickly, there is a push to reuse existing substructures while replacing entire superstructures. Often, these substructures are unreinforced concrete (URC) or unreinforced masonry (URM). In order for these URC or URM ...
  • Fatal Trespasser Strikes in the United States 20122017 Research Results
    Fatal Trespasser Strikes in the United States: 2012-2017 [Research Results]
    Kidda, Starr ;
    Chase, Stephanie G.
    2020-01-01 | PDF
    The results of the analysis show that California, New York, Florida, and Texas consistently had the highest number of fatal trespasser strikes, regardless of intent. Fatal suicide strikes most often occur during the spring, while non-suicides occur most often in the summer. Suicides tend to take place during later evening hours (8:00 p.m. to 12:00 ...
  • Fire Performance of a UNT75 Portable Tank Phase 1 Loaded With Liquid Nitrogen
    Fire Performance of a UN-T75 Portable Tank Phase 1: Loaded With Liquid Nitrogen
    Huczek, Jason ;
    Blais, Matthew
    2020-01-01 | PDF
    Southwest Research Institute (SwRI) fire-tested a portable tank (filled with liquid nitrogen [LN2]) and observed the demonstration of the performance of the pressure relief valve system in this Phase 1 project. In addition, several types of data have been collected during the experiment to understand how the fire exposure affects the internal and e ...
  • Trespasser Intent Determination and Evaluation TIDE Criteria Research Results
    Trespasser Intent Determination and Evaluation (TIDE) Criteria [Research Results]
    Kidda, Starr ;
    Chase, Stephanie G.
    2020-01-01 | PDF
    Findings showed that probable suicide determinations were similar between the official determination by a medical examiner or coroner and the TIDE criteria. However, TIDE was more likely to see accidents as inconclusive due to the absence of evidence. The lack of information available in some incident reports makes it impossible to render a determi ...
  • Teamwork in Railroad Operations and Implications for New Technology
    Teamwork in Railroad Operations and Implications for New Technology
    Roth, Emilie M. ;
    Rosenhand, Hadar
    2020-01-01 | PDF
    This report examines teamwork processes that contribute to railroad operation safety. It integrates findings from previously conducted Cognitive Task Analyses (CTAs) that analyzed the cognitive and collaborative work of dispatchers (Roth, Malsch, and Multer, 2001), roadway workers (Roth and Multer, 2007), locomotive engineers (Roth and Multer, 2009 ...
  • Higher Reliability and Capacity Train Control
    Higher Reliability and Capacity Train Control
    Vieira, Paulo ;
    Rosales-Yepez, Jose
    2019-12-27 | PDF
    Researchers developed new concepts of train control systems that could potentially offset the negative impacts to train operations introduced by the current implementation of PTC (Overlay PTC). They investigated the effects on railroad network operation caused by the operation of PTC, such as the conservatism of train braking enforcement algorithms ...
  • Wheel Bearing BrakeInstrumented Wheelset WBBIWS Friction Characterization Study
    Wheel Bearing Brake/Instrumented Wheelset (WBB/IWS) Friction Characterization Study
    Szablewski, Daniel ;
    Caldwell, Robert
    2019-12-01 | PDF
    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, gage face lubricants, and other third-body materials that exist at the W/R interface due to non-controlled environmental factors (e.g., rain, ice, plants, etc.). Friction acts ...
321 - 340 / 1162