United States Department of Transportation
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Experimental evaluation of the Continuous Risk Profile (CRP) approach to the current Caltrans methodology for high collision concentration location identification
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2012-03-31
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[PDF-3.77 MB]
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OCLC Number:839334142
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Abstract:This report evaluates the performance of Continuous Risk Profile (CRP) compared with the
Sliding Window Method (SWM) and Peak Searching (PS) methods. These three network
screening methods all require the same inputs: traffic collision data and Safety Performance
Functions (SPFs), however, depending on how these input parameters are analyzed at the network
screening level, the result of the analysis can vary significantly. Findings indicated that the CRP
method produced far fewer false positives than SWM and PS. The false negative rates for CRP,
SWM and PS were comparable. These findings indicate that by using the CRP method, California
Department of Transportation (Caltrans) can significantly reduce the resources spent on
investigating falsely identified locations and better utilize the resources in improving high collision
concentration locations. It will also help Caltrans in reducing the backlog in Caltrans Table C.
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