Discussion on “Field Test Performance of Noncontact Ultrasonic Rail Inspection System”

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In general, the development of novel technology for rail inspection is very welcome indeed. The paper under discussion was well written by the authors. The field investigation results at the Rail Defect Test Facility of the Transportation Technology Center in Pueblo, Colorado are critical for rail inspection management in practice. The discussion paper highlighted previous field experience and findings of rail surface defects. The field experience and some practical findings in this discussion would be useful and should encourage the authors to extend their future research and development with respect to the classification and quantification of rail surface defects in practice.
Original languageEnglish
Article numberTEENG-4486
JournalJournal of Transportation Engineering, Part A: Systems
Issue number4
Early online date9 Feb 2018
Publication statusE-pub ahead of print - 9 Feb 2018


  • rail surface defects
  • wheel/rail interaction
  • wheel-rail contact
  • rail squats
  • rail studs
  • Rolling contact fatigue
  • track inspection
  • Non-destructive testing


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