Use of roadway attributes in hot spot identification and analysis.
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Use of roadway attributes in hot spot identification and analysis.

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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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