The objective of this study was to identify and analyze the occurrence of secondary crashes on roadways in Kentucky and recommend countermeasures to reduce their frequency and severity. Results show a small percentage of crashes coded as a 'Secondary Collision' were confirmed to be a secondary crash based on the definition and requirement of 'a crash occurring as a result of a previous crash'. It appeared that many of those miscoded as a 'Secondary Collision' were the result of misinterpretation of what constituted a secondary crash versus a secondary event. Adoption of the definition used in this analysis, along with more training and data input quality control was recommended. A review of 9,330 crashes coded as a 'Secondary Collision' confirmed 362 or 3.88 percent as secondary crashes, and matching collision reports for the previous crash were located for only 236 crashes. An alternative analysis involved a query of the CRASH database to determine the time and distance relationships between the primary and subsequent-related crashes. The algorithm was able to identify 87 percent of the secondary crashes that were previously identified with the extensive manual search and review of crash reports.


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    Titel :

    Identification of Secondary Crashes and Recommended Countermeasures


    Beteiligte:
    J. G. Pigman (Autor:in) / J. R. Walton (Autor:in) / E. R. Green (Autor:in)

    Erscheinungsdatum :

    2011


    Format / Umfang :

    23 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch





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