Draft regulation Impact Statement for Underrun Protection a draft statement inviting discussion and comments from parties affected by the proposed heavy commercial vehicle safety initiative January 2007 Report Documentation Page

5. Estimate the effectiveness of the different UP device types;

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  Note the reported effectiveness of devices under studies at various speeds to reduce fatal, serious and minor injuries,
  
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  Average the effectiveness at various speeds,
  
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  Both increase and decrease the effectiveness to give a number of alternative scenarios (A,B,C,) for sensitivity analysis,
  
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  Add an extra scenario to represent energy absorbing UP devices (D).