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52550
  
  

  8
Dec
2023
Technical Reports
PTC Communications: Cybersecurity Technology Review and Concept of Operations
Author
          Federal Railroad Administration

Subject
                    Positive Train Control,
                    Security

**Keywords:** Positive Train Control, PTC, railroad, shared network, Interoperable Train Control Messaging, ITCM, cybersecurity, encryption, National Institute of Standards and Technology, NIST, ELLI
**Abstract:** Researchers sought to determine how to improve the confidentiality of information passing through the...
Report Number
              DOT/FRA/ORD-23/39

  Office
              RDI-23
    29
Sep
2023
Technical Reports
I-ETMSTM Positive Train Control Passenger Braking Algorithm Enhancement – Phase II
Author
          Federal Railroad Administration

Subject
                    Positive Train Control

**Keywords:** Positive Train Control, PTC, braking, braking algorithm enhancements, field testing, Electric Multiple Unit, EMU, Diesel Multiple Unit, DMU, enforcement algorithm, enforcement algorithms, EA
**Abstract:** The Federal Railroad Administration (FRA) funded Transportation Technology Center, Inc. (TTCI) to examine the performance benefits of four potential modifications to the...
Report Number
              DOT/FRA/ORD-23/36

  Office
              RDI-23
    12
Sep
2023
Safety Advisories
Safety Advisory 2023-04; High-Impact Wheels Causing Damage to Rails and Track
Author
          Federal Railroad Administration

Subject
                    Safety Advisories

**Keywords:** Safety Advisory, high-impact wheels, Wheel Impact Load Detectors (WILD)
**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...
Safety Advisory Number
              2023-04
    11
Jul
2023
Technical Reports
Development of an Operationally Efficient PTC Braking Enforcement Algorithm for Freight Trains
Author
          Joe Brosseau, Bill Moore Ede, Shad Pate, RB Wiley, and Joe Drapa

Subject
                    Positive Train Control

**Keywords:** Braking algorithm, enforcement algorithm, positive train control, PTC, train control, simulation, Monte Carlo simulation, adaptive enforcement algorithm, emergency brake backup
**Abstract:** Software algorithms used in positive train control (PTC) systems designed to predict freight train stopping distance and enforce a penalty brake application have been shown to...
Report Number
              DOT/FRA/ORD-13/34

  Office
              RRD
    11
Jul
2023
Technical Reports
Development of an Operationally Efficient PTC Braking Enforcement Algorithm for Freight Trains: Appendices F
Author
          Joe Brosseau, Bill Moore Ede, Shad Pate, RB Wiley, and Joe Drapa

Subject
                    Braking Systems,
                    Positive Train Control,
                    Signal and Train Control

**Keywords:** Braking algorithm, enforcement algorithm, positive train control, PTC, train control, simulation, Monte Carlo simulation, adaptive enforcement algorithm, emergency brake backup

Report Number
              DOT/FRA/ORD-13/34

  Office
              RRD

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