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                Risk Factors Associated with High Potential for Serious Crashes
**Description:**
        This information guide presents the development of a crash risk index for assessing safety on low-volume roads in Oregon. Crashes on low-volumes roads are more infrequent than on higher volume roads, which make identifying trends and treating sites based on historical data difficult. To address network screening and project selection issues with traditional analysis methods, the Oregon Department of Transportation (ODOT) identified risk factors associated with an increased risk for crashes, and developed a crash risk index with road geometry, roadside features, crash history, and traffic exposure as inputs. The guide presents a literature review noting common geometric, operational, and roadside features that contribute to crash risk, as well as safety and risk indices used in other research. The following sections explain the development of the risk index for ODOT. The guide discusses the economic feasibility of various countermeasures that are well suited for implementation using the risk index analysis method. Finally, the guide presents a brief case study of applying the risk index to identify roads for improvement.
    
          **Tool Type:**
        Informational Guide
    
    
    
          **Owner Source:**
        state
    
          **Sponsor/Owner:**
        Oregon Department of Transportation (ODOT)
    
        **Published:**
      2003
    
        **Availability:**
      The information guide is free of charge at the following link: Safety System Assessment Framework.
    
          **Disclaimer:**
        This information is disseminated under the sponsorship of the U.S. Department of Transportation in the interest of information exchange. The U.S. Government assumes no liability for the use of the information contained herein. This information does not constitute a standard, specification, or regulation. The U.S. Government does not endorse products or manufacturers. Trademarks or manufacturer's names appear in this information only because they are considered essential to the objective of this publication.
          Any opinions, findings, and conclusions or recommendations, and translations thereof, expressed in this publication are those of the author(s) and do not necessarily reflect the views of the Federal Highway Administration. U.S. DEPARTMENT OF TRANSPORTATION

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