Technical Reports

Cost/Benefit Analysis of Head Shields for 112A/114A Series Tank Cars

  • 26
  • Jul
  • 2016
AUTHOR: Adams, D. E.; Bullerdiek, W. A.; Pattern, J. S.; Vassalo, F. A.
OFFICE: RPD
SUBOFFICE: RPD-30
REPORT NUMBER: FRA-OR&D 75-34 Final Rpt.
SUBJECT: Hazardous Materials
KEYWORDS: Protectors, Shielding, Benefit cost analysis, Tank cars, Railroad cars, Piercing, Accidents, Fire safety, Hazardous materials, Liquefied gases, Rail transportation, Class 112A tank cars, Class 114A tank cars, DOT/5A, DOT/4DZ/DC, Railroad accidents
ABSTRACT: A cost/benefit analysis of head shields installed on new and existing 112A/114A series pressure tank cars was performed based on a redistribution of accident dollar losses. Head shields are designed to prevent puncture of a tank car head during an accident with resulting loss of lading and possibly extensive fire damage. The design of the head shields and data for the analysis were obtained from Railway Progress Institute (RPI) - Association of American Railroads (AAR) cooperative research program reports. The RPI/AAR considered accident data for the years 1965-1970 and assigned accident dollar losses during that period according to the tank element that failed. Supporting evidence is presented indicating that dollar losses are strongly related to puncture distribution for a more extensive set of data including all classes of tank cars.
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