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Use of roadway attributes in hot spot identification and analysis.
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Use of roadway attributes in hot spot identification and analysis.
  • Publication/ Report Number:
    UT- 15.10
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  • Abstract:
    This research focuses on the addition of roadway attributes in the selection and analysis of ―hot spots.‖ This

    is in conjunction with the framework for highway safety mitigation in Utah with its six primary steps: network

    screening, diagnosis, countermeasure selection, economic appraisal, project prioritization, and effectiveness

    evaluation. The addition of roadway attributes was included as part of the network screening, diagnosis, and

    countermeasure selection, which are included in the methodology titled ―Hot Spot Identification and Analysis‖ in

    UDOT Report No. UT-13.15. Included in this research was the documentation of the steps and process for data

    preparation and model use for the step of network screening and the creation of report forms for the steps of

    diagnosis and countermeasure selection.

    The addition of roadway attributes is required at numerous points in the process. Methods were developed

    to locate and evaluate the usefulness of available data. Procedures and systemization were created to convert raw

    data into new roadway attributes, such as grade and vertical sag/crest curve location. For the roadway attributes to

    be useful in selection and analysis, methods were developed to combine and associate the attributes to crashes on

    problem segments and problem spots. The methodology for ―Hot Spot Identification and Analysis‖ was enhanced to

    include steps for inclusion and defining of the roadway attributes. These methods and procedures were used to help

    in the identification of safety hot spots to be analyzed and countermeasures selected. Examples of how the methods

    are to function are given with sites from Utah’s state roadway network.

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