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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 141 - 160 of 1168 results
  • Track Performance in Tunnels and Transitions with Under Tie Pads and Under Ballast Mats Research Results
    Track Performance in Tunnels and Transitions with Under Tie Pads and Under Ballast Mats [Research Results]
    Stuart, Cameron ;
    Riding, Kyle A
    2022-08-01 | PDF
    Railroads have begun to use under tie pads and under ballast mats in rail track construction to better distribute train loads, reduce the track modulus, and increase the tie-to-ballast contact area. Many tunnels, bridges, and track locations with a shallow ballast layer are strong candidates for under tie pads and under ballast mats. This report re ...
  • Feasibility of a Train Horn with Optimized Directivity Environmental and Occupational Noise Benefit of an Ideal Train Horn
    Feasibility of a Train Horn with Optimized Directivity: Environmental and Occupational Noise Benefit of an Ideal Train Horn
    Ross, Jason ;
    Johnson, Timothy
    2022-08-01 | PDF
    This report examines the feasibility of and recommends an acoustical specification for such an optimized horn. The detectability of the horn signal for motorists inside vehicles, the areas of environmental noise impact and occupational noise exposure have been compared for the optimized horn and several typical standard horn systems. It has been fo ...
  • AirBorne Tie Sonar for Loaded Tie Deflection Measurements Research Results
    Air-Borne Tie Sonar for Loaded Tie Deflection Measurements [Research Results]
    Stuart, Cameron ;
    Lanza di Scalea, Francesco
    2022-08-01 | PDF
    This report presents a non-contact ultrasonic technique to map the full-field surface deflection of railroad ties using known concepts of sonar-based distance measurements. Between September 2019 and July 2021, the University of California San Diego (UCSD) created a beam with six sonar sensors and performed field testing at the UCSD Rail Defect Tes ...
  • Automated Track Centerline Following for Drone Flight Automation Research Results
    Automated Track Centerline Following for Drone Flight Automation [Research Results]
    Stuart, Cameron ;
    Doran, Joshua
    2022-08-01 | PDF
    VisioStack Inc. completed initial research to automate drone inspection flights over railroad track using real-time rail detection and track centerline following to simulate flight control without Global Positioning System (GPS) information. Uncrewed Aerial Systems (UAS, or drones) are platforms that may enable more frequent and safer track inspect ...
  • Hybrid Locomotive Waste Heat Recovery System LWHRS Safety and Field Demonstration
    Hybrid Locomotive Waste Heat Recovery System (L-WHRS) Safety and Field Demonstration
    Filippone, Claudio ;
    Shurland, Melissa
    2022-07-11 | PDF
    ThermaDynamics Rail LLC (TDR) developed the Locomotive-Waste Heat Recovery Systems (L-WHRS) formed by high-pressure heat exchangers coupled to a closed-loop Organic Rankine Cycle (ORC). The L-WHRS can be configured to be non-invasively retrofitted onto different types of locomotive engines to recover and convert locomotive waste thermal energy into ...
  • FullScale Shell Impact Test of a DOT113C120W9 Tank Car Filled With Liquid Nitrogen Research Results
    Full-Scale Shell Impact Test of a DOT-113C120W9 Tank Car Filled With Liquid Nitrogen [Research Results]
    United States. Department of Transportation. Federal Railroad Administration. Office of Research and Development
    2022-07-01 | PDF
    On May 14, 2022, the Federal Railroad Administration (FRA) conducted a full-scale shell impact test (Test 13) of a DOT-113C120W9 (also identified as DOT-113) specification tank car at the Transportation Technology Center (TTC) in Pueblo, CO. This test was the final impact test in a planned series of four. A DOT-113 is a double-walled tank car (i.e. ...
  • QuasiStatic and Dynamic Research Testing of Crashworthy Tables Research Results
    Quasi-Static and Dynamic Research Testing of Crashworthy Tables [Research Results]
    United States. Department of Transportation. Federal Railroad Administration. Office of Research, Development and Technology
    2022-07-01 | PDF
    Researchers crash-tested donated, fixed workstation tables according to the procedures in the February 17, 2021, draft of the “Fixed Workstation Tables in Passenger Railcars” safety standard [1] from the American Public Transportation Association (APTA), APTA-PR- CS-S-018-13, Rev. 2 (S-018). Researchers dynamically sled-tested the tables with anthr ...
  • Positive Train Control Passenger Braking Algorithm Enhancement Phase II Research Results
    Positive Train Control Passenger Braking Algorithm Enhancement – Phase II [Research Results]
    United States. Department of Transportation. Federal Railroad Administration. Office of Research, Development and Technology
    2022-07-01 | PDF
    The Federal Railroad Administration (FRA) sponsored research to examine the performance benefits of four potential modifications to the current methodology used for passenger braking enforcement algorithms (EAs) in Positive Train Control (PTC) applications: Target Approach Management (TAM), specified consist length trains, tuned train types, and ad ...
  • Broken Rail and Rollout Detection to Support QMB Operations
    Broken Rail and Rollout Detection to Support QMB Operations
    Kindt, Joel ;
    Khater, Mohamad
    2022-07-01 | PDF
    Researchers collaborated with a railroad advisory group to demonstrate the validity of a track circuit concept that supports the Quasi-Moving Block (QMB) method of train control. They performed proof-of-concept testing, capacity analysis, hazard analysis, and requirements development. QMB is one of three new additional modes of train control that h ...
  • Aerodynamic Assessment and Mitigation Design Considerations for HighSpeed Rail
    Aerodynamic Assessment and Mitigation – Design Considerations for High-Speed Rail
    Sturt, Richard ;
    Lynch, Paul
    2022-07-01 | PDF
    This report presents the means to identify and assess impacts and mitigation methods for aerodynamic effects of high-speed trains on high-speed rail corridors for designers, operators, and other affected parties. It provides descriptions of basic concepts, criteria, standards, and examples of calculations and analysis of aerodynamic effects from th ...
  • Longitudinal Resistance Modeling for Frozen Ballast Research Results
    Longitudinal Resistance Modeling for Frozen Ballast [Research Results]
    Baillargeon, Jay ;
    Woody, Stephen (Sean)
    2022-07-01 | PDF
    On behalf of the Federal Railroad Administration (FRA), Transportation Technology Center, Inc. (TTCI) developed a “proof-of-concept” finite element (FE) longitudinal resistance model to simulate a rail break based on historical data. Longitudinal track resistance (fo) is an important parameter for rail break repairs to re-establish the rail neutral ...
  • Finite Element Analyses of Side Impacts to DOT113 Surrogate Tank Cars with Water and Liquid Nitrogen
    Finite Element Analyses of Side Impacts to DOT-113 Surrogate Tank Cars with Water and Liquid Nitrogen
    Eshraghi, Shaun ;
    Krishnamurthy, Aswani
    2022-06-01 | PDF
    On June 11, 2022, the Federal Railroad Administration (FRA) conducted a side impact test on a surrogate DOT-113 tank car filled with water at the Transportation Technology Center (TTC) to (1) evaluate its performance under dynamic impact conditions and (2) provide data for the verification and refinement of a computational model. The tank car was f ...
  • Integrity of Rail Passenger Equipment Glazing Systems
    Integrity of Rail Passenger Equipment Glazing Systems
    Prabhakaran, Anand ;
    Gantoi, Florentina
    2022-06-01 | PDF
    Failures of glazing retention mechanisms on passenger trains have led to multiple injuries and fatalities in rollover-type accidents over the last several decades. This research effort reviewed global standards for glazing system design and performance, as well as modes of retention failures under accident conditions, and proposed design concepts t ...
  • F40 CEM Locomotive and M1 Passenger Car Impact Test
    F40 CEM Locomotive and M1 Passenger Car Impact Test
    DeGeorge, Matthew ;
    Gorhum, Travis
    2022-06-01 | PDF
    An impact test with a F40 locomotive and a M1 passenger car was conducted to evaluate the performance of the vehicles under dynamic conditions. The locomotive was retrofitted with crash energy management (CEM) components – including a push-back coupler (PBC), deformable anti-climbers, and a sliding lug connected to the draft pocket with a set of sh ...
  • Short Line Safety Institute Identifying Safety Culture Trends in the Industry Research Results
    Short Line Safety Institute: Identifying Safety Culture Trends in the Industry [Research Results]
    Kidda, Starr ;
    Leone, Julia
    2022-06-01 | PDF
    The Short Line Safety Institute (SLSI) is dedicated to the continuous improvement of safety and safety culture across all short line and regional railroads in the United States. Strengthening a railroad’s safety culture may result in less frequent or severe accidents and create a safer working environment. SLSI defines safety culture as the shared ...
  • Validation of Scaling Laws for FullyDeveloped Passenger Rail Car Fires
    Validation of Scaling Laws for Fully-Developed Passenger Rail Car Fires
    Hodges, Jonathan ;
    DiDomizio, Matthew (Matt)
    2022-06-01 | PDF
    The focus of this effort was to confirm the capability of the scaling laws to predict full-scale fully-developed compartment fire heat release rates (HRR) based on reduced-scale experiments. A total of 17 compartment fire tests were conducted in this effort consisting of 14 unique configurations and three repeated tests. Tests were conducted at thr ...
  • Framework for Wheel Life Model Phase I
    Framework for Wheel Life Model – Phase I
    Jang, Bora ;
    Singh, Som P.
    2022-06-01 | PDF
    Researchers developed a model to predict the life of a freight railroad car wheel due to rolling contact fatigue, crack initiation and growth leading to fracture. The Phase I effort includes a literature survey, an estimation of hoop residual stress from manufacturing process, and the effects of mechanical load – including traction and thermal load ...
  • Risk Analysis Methodology for Unit and Manifest Trains Transporting Hazardous Materia
    Risk Analysis Methodology for Unit and Manifest Trains Transporting Hazardous Materia
    Liu, Xiang ;
    Kang, Di
    2022-05-15 | PDF
    Between August 2019 and May 2022, the Federal Railroad Administration sponsored researchers from Rutgers University, the University of Illinois at Urbana Champaign, Applied Research Associates, and the University of Houston to develop a risk analysis methodology for railroad transportation of hazardous materials (hazmat) given specific parameters ( ...
  • RailMounted Strain Gauges for Tie Reaction Measurement Under Dynamic Loading Research Results
    Rail-Mounted Strain Gauges for Tie Reaction Measurement Under Dynamic Loading [Research Results]
    Thompson, II, Hugh B ;
    Alturk, Rakan
    2022-05-01 | PDF
    Several research and field applications have backed the crib circuit (CC) (i.e., installed between two ties) for vertical wheel load measurement. However, no studies have explored whether the tie circuit (i.e., installed on top of a tie) is valid for rail-tie interface force measurement. Thus, questions remain about its accuracy. On October 2021, t ...
  • Centralized Interlocking for Moving Block Research Project
    Centralized Interlocking for Moving Block Research Project
    Rosales-Yepez, Jose ;
    Vieira, Paulo
    2022-05-01 | PDF
    Transportation Technology Center, Inc. (TTCI) researched and developed concepts for a centralized interlocking (CIXL) system to satisfy the needs of North American railroads. The system leverages the Quasi-Moving Block (QMB) train control method; and provides maintainability and availability benefits. The proposed CIXL system is based on Positive T ...
141 - 160 / 1168