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52550
  
  

  25
Jul
2014
Technical Reports
Evaluation of Wheel/Rail Contact Mechanics: Concepts Report
Author
          Mehdi Ahmadian and Michael Craft

Subject
                    Track,
                    Tracks & Structures,
                    Track/Train Interactions

**Keywords:** Roller Rig, Wheel-Rail Contact Mechanics, Rail Vehicle Dynamics, Contact Patch Dynamics, Wheel Forces and Moments
**Abstract:** A need exists for a new test rig design with advanced sensing technologies that will allow the railroad industry and regulatory agencies to better understand the wheel-rail...
Report Number
              DOT/FRA/ORD-14/28

  Office
              RDI-21
    24
Jul
2014
Technical Reports
Multifunction LIDAR Sensors for Noncontact, Speed, and Complex Rail Dynamics
Author
          Mehdi Ahmadian, Michael Craft and Cameron Stuart

Subject
                    Track,
                    Tracks & Structures,
                    Track/Train Interactions

**Keywords:** LIDAR, noncontact velocity measurement, curvature, alignment, ATGMS, track geometry, Railway Technologies Laboratory, Virginia Tech
**Abstract:** The results of an extensive series of tests are presented to evaluate the viability and applicability of LIDAR systems for measuring track speed, distance, and curvature in...
Report Number
              DOT/FRA/ORD-14/26

  Office
              RDI-21
    20
Feb
2013
Technical Reports
Characterization of Railroad Bridge Service Interruptions
Author
          Richard Joy, Mary Clara Jones, Duane Otter, and Luis Maal

Subject
                    Bridge and Structures Safety,
                    Track,
                    Tracks & Structures,
                    Track/Train Interactions

**Keywords:** bridge problems, risk control matrix, Railroad Bridge Service Interruption Database
**Abstract:** The Federal Railroad Administration contracted Transportation Technology Center, Inc., to study bridge problems that cause accidents or service interruptions and to use this...
Report Number
              DOT/FRA/ORD-13/05

  Office
              RRD
    1
May
2003
Technical Reports
Instrumented Wheelset Test: Material Handling Cars in Service from New York City to Chicago
Author
          Steven Belport

Subject
                    Track/Train Interactions

**Keywords:** Vehicle/Track Interaction Safety Limits, Vertical Carbody Acceleration, Wheel Unloading
**Abstract:** Vehicle performance tests were conducted on empty 1400-series Amtrak Material Handling Cars (MHC) from Albany, New York, to Chicago, Illinois. TTCI used its 33-inch instrumented...
Report Number
              DTFR53-93-C-00001

  Office
              RRD
    24
Jan
2003
Technical Reports
Vertical Track Modulus in Plastic Composite Tie Test Zones at FAST
Author
          Federal Railroad Administration; Rafael Jimenez

Subject
                    Track,
                    Tracks & Structures,
                    Track/Train Interactions

**Keywords:** Heavy axle load, stiffness,
**Abstract:** Transportation Technology Center (TTCI) conducted vertical track modulus tests on existing plastic composite tie test zones on the High Tonnage Loop (HTL) at the Federal Railroad...
Report Number
              DOT/FRA/ORD-03/13

  Office
              RRD

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