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52550
  
  

  8
Oct
2019
Technical Reports
Acoustical Warning Devices as Emergency Warning Systems, Phase 1
Author
          Federal Railroad Administration

Subject
                    Emergency Notification Systems,
                    Grade Crossing Technology

**Keywords:** Emergency warning, train horn, trespassers, music masking sounds, reaction time, acoustic warning device
**Abstract:** Acoustical warning devices are designed to warn trespassers of an approaching train. This study evaluated the urgency and detectibility of potential warning sounds.
Report Number
              DOT/FRA/ORD-19/40

  Office
              RDI-23
    15
Apr
2019
Technical Reports
Quasi-Static Research Testing of Workstation Tables
Author
          Federal Railroad Administration

Subject
                    Occupant Protection,
                    Crashworthiness - Passenger Equipment,
                    Testing

**Keywords:** Passenger rail car, workstation tables, energy absorption, interior crashworthiness, train collision safety
**Abstract:** Sharma & Associates, Inc. (SA) performed quasi-static destructive loading tests on two different designs of passenger workstation tables in accordance with the requirements of...
Report Number
              DOT/FRA/ORD-19/08

  Office
              RDI-22
    10
Sep
2018
Technical Reports
Material and Manufacturing Requirements for Freeze-Thaw Durable Concrete Railroad Ties, Appendices A Through C
Author
          Federal Railroad Administration

Subject
                    Testing

**Keywords:** Concrete consolidation, air void system, freeze-thaw durability, concrete crosstie
**Abstract:** Appendix A documents additional rheological data taken on concrete during vibration; while Appendix B depicts the measured and predicted temperature and relative humidity of...
Report Number
              DOT/FRA/ORD-18/31

  Office
              RDI-21
    5
Sep
2018
Technical Reports
Inspection of Concrete Ties Using Sonic/Ultrasonic Impact Velocity and Impact Echo Measurements
Author
          Federal Railroad Administration

Subject
                    Testing

**Keywords:** Concrete, crossties, ties, Rayleigh waves, impact echo, impact velocity
**Abstract:** This report documents NDT Corporation’s development of a non-destructive system for inspecting the internal condition of concrete crossties using sonic/ultrasonic impact velocity...
Report Number
              DOT/FRA/ORD-18/32

  Office
              RDI-21
    27
Aug
2018
Technical Reports
Material and Manufacturing Requirements for Freeze-Thaw Durable Concrete Railroad Ties: Volume II
Author
          Federal Railroad Administration

Subject
                    Testing

**Keywords:** Concrete consolidation, air void system, freeze-thaw durability, concrete crossties, vibratio
**Abstract:** This study was performed to determine the effects of vibration on concrete air voids and freeze-thaw durability, and applicable freeze-thaw quality control tests. Volume I of the...
Report Number
              DOT/FRA/ORD-18/31

  Office
              RDI-21

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