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30
Jul
2018
Technical Reports
Field Demonstration of Geocell Track Substructure Support System Under High-Speed Passenger Railroad Operations
Subject
Track
Keywords: Track geometry, high-speed track, track quality index, TQI, ballast, sub-ballast, subgrade, Surfacing Cycle, geocell, Neoweb™, Amtrak, Northeast Corridor, NEC
Abstract: Regions of track, which experience high rates of track geometry degradation, tend to require frequent maintenance interventions that are typically surfacing or tamping. Harsco...
Report Number
DOT/FRA/ORD-18/27
Office
RDI-21
25
Jul
2018
Technical Reports
DOTX 218 Survey Conducted on Pan Am Railways
Subject
Track
Keywords: DOTX 218, gage restraint measurement system, GRMS, track strength, track performance characterization, Downeaster-Portland North
Abstract: This report summarizes the results from a May 12, 2014, survey conducted with the Federal Railroad Administration’s (FRA) gage resistant measurement system vehicle (GRMS), DOTX...
Report Number
DOT/FRA/ORD-18/25
Office
RDI-21
16
Jul
2018
Technical Reports
Field Investigation and Modeling of Track Substructure Performance Under Trains Moving at Critical Speed
Subject
Track
Keywords: Track-subgrade modeling, field validation, critical speed, high-speed rail, ground vibration, ground penetrating radar, GPR
Abstract: The purpose of this research performed by Pennsylvania State University between September 2012 and September 2015 was to formulate and validate a 3D dynamic track-subgrade...
Report Number
DOT/FRA/ORD-18/21
Office
RDI-21
13
Jul
2018
Research Results
Positive Train Control Interoperability Test Support: Radio Frequency Desense Testing
Subject
Track
Keywords: PTC, ITC, ACSES, radio frequency, RF desense testing
Abstract: The Federal Railroad Administration (FRA) sponsored research that was conducted by Transportation Technology Center, Inc. (TTCI) to evaluate the performance of the Advanced...
Report Number
RR 18-10
Office
RDI-23
26
Jun
2018
Technical Bulletins
49 CFR Part 240 Safety Guidance: Motor Vehicle recordkeeping requirements; National Driver Register Data with States
Subject
Operating Practices
Keywords: Engineer Certification
Abstract: The Bulletin recognizes changes the National Highway Traffic Administration (NHTSA) has made to streamline the process for obtaining information from the National Driver...
Bulletin Number
OP-2018-01
Discipline
Operating Practices