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            In This Section
        Safety Data Analysis & Tools
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                Highway Safety Manual (HSM)
**Description:**
        The Highway Safety Manual (HSM) provides a structured framework for data-driven safety management. It provides quantitative analysis methods for safety management as well as qualitative considerations related to other aspects of the roadway such as capacity, pedestrian amenities, and transit service. The manual can be used to guide agencies as they consider improvements to existing roadways or as they are planning, designing, or constructing new roadways. The HSM presents information on roadway safety fundamentals, the safety management process, models for estimating the expected safety performance of a specific facility, and crash modification factors (CMFs) for estimating the expected effectiveness of individual infrastructure-based countermeasures.
    
    
    
    
          **Owner Source:**
        organization
    
          **Sponsor/Owner:**
        American Association of State Highway and Transportation Officials (AASHTO)
    
        **Published:**
      2010
    
        **Availability:**
      The manual is available for a fee at the following link: Highway Safety Manual.
    
          **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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