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52550
  
  

  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
    28
Sep
2023
Technical Reports
Automated Train Operation Interface Requirements Specification Development Summary Report
Author
          Federal Railroad Administration

Subject
                    Train Control

**Keywords:** Automated Train Operation, ATO, Automated Train Operation Support Operation Support System Back Office, ATOSS BO Interface Requirement Specification, IRS, Interoperable Train Control Automated Train Operation Executive, ITC-ATO Ex, Interoperable Train Con
**Abstract:** The Federal Railroad Administration contracted Transportation Technology Center, Inc. to define Interface Requirement Specification (IRS) documents for an Interoperable Train...
Report Number
              DOT/FRA/ORD-23/31

  Office
              RDI-23
    15
Sep
2023
Technical Reports
Vehicle Dynamics Models for Derailment Incident Investigation
Author
          Federal Railroad Administration

Subject
                    Rolling Stock

**Keywords:** Derailment, freight car dynamics, vehicle dynamics, VAMPIRE simulations, vehicle track interaction, wheel rail interaction
**Abstract:** When investigating a train derailment, vehicle/track interaction (VTI) using vehicle dynamics simulations of the key vehicles in the derailed train can help identify specific...
Report Number
              DOT/FRA/ORD-23/27

  Office
              RDI-22
    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
Locomotive Crash Energy Management Train-to-Train Collision Test
Author
          Federal Railroad Administration

Subject
                    Rolling Stock

**Keywords:**  Impact test, crash energy management, CEM, occupant protection systems, transportation safety, passenger car safety
**Abstract:** The Federal Railroad Administration (FRA) sponsored MxV Rail to conduct a collision test using both a moving and a stationary three-car consist. The moving consist included an...
Report Number
              DOT/FRA/ORD-23/22

  Office
              RDI-22

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