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Track-Related Research, Volume 7: Guidelines for Guard/Restraining Rail Installation (2010) / Chapter Skim
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1.2 Philosophy II
Pages 3-4

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From page 3...
... The following (based on the Research Needs Statement for Optimizing the Check Gauge of Restraining Guard Rail1) are reasons for installing guard rails using Philosophy II: • Because of the variations in the wheel mounting back-toback dimensions, wheel flange wear, rail gage face wear, and track gage variations, it is impossible to have shared contact with both the high rail and the guard/restraining rail in any reliable manner.
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From page 4...
... • Task 2: Quantify the performance/benefits of both philosophies and recommend a preferred method through modeling using the following key results as a basis for comparison: – Lateral forces developed (implying damage on rail and fastening system) ; – Rolling resistance (implying energy consumption)
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Key Terms

  • rail installation
  • installation philosophy
  • restraining rail
  • track gage
  • restraining guard

  • check gauge
  • optimal flangeway
  • conducted research
  • lateral forces
  • tcrp project

  • rail reduces
  • rail gradually
  • rail transit
  • rail resists
  • rail gage

  • low rail
  • rail study
  • shared contact
  • simultaneous contact
  • results digest

  • restraining rails
  • roughly equal
  • obvious question
  • forces developed
  • gage dimension

  • adverse steering
  • tcrp research
  • icantly increased
  • installation philosophies
  • flangeway clearances


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