In-Service Performance Evaluation: Guidelines for the Assembly and Analysis of Data (2022) / Chapter Skim
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Pages 26-33
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From page 26... ...
26 4.1 General An ISPE of roadside safety features assesses the performance of the safety feature under actual field conditions at actual impact speeds and angles and with the actual vehicle population. Evaluation measures are provided in this section for both routine and investigative ISPEs.
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From page 27... ...
Evaluation Measures 27 is the proportion of fatal and serious-injury (KA) crashes to all crashes.
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28 In-Service Performance Evaluation: Guidelines for the Assembly and Analysis of Data 4.3.1.1 Evaluation A (Breach of Safety Feature) Longitudinal barriers (i.e., SFUE = 1)
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Evaluation Measures 29 4.3.2.3 Evaluation H (Vehicle Mix) Evaluation H is intended to evaluate occupant risk across and within the vehicle and speed mix the safety feature is exposed to while in service.
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30 In-Service Performance Evaluation: Guidelines for the Assembly and Analysis of Data 4.3.3.4 Evaluation M (Impact Orientation) Evaluation M is intended to evaluate the relative risk of the impact orientation for a value of SFUE equal to 1 (i.e., longitudinal barriers)
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Evaluation Measures 31 Measure Notes Point Estimate ( ) ES A (Breach)
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32 In-Service Performance Evaluation: Guidelines for the Assembly and Analysis of Data would be impractical. A jurisdiction may determine a different CI and provide justification within the ISPE documentation.
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From page 33... ...
Evaluation Measures 33 may also result in the identification of suggested improvements to national crash testing or placement guidelines (i.e., MASH or the RDG)
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