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                Continuous Friction Measurement Equipment as a Tool for Improving Crash Rate Prediction - A Pilot Study
**Description:**
        This information guide presents Virginia Department of Transportation’s (VDOT) efforts to develop a pavement friction management program, and integrate pavement friction inventory data with crash records to improve overall crash prediction and examine the effects of friction on safety. Continuous friction measuring equipment Grip Tester was used to pilot test this methodology in one construction district.
VDOT engineers modified existing safety performance functions to include skid resistance and radius of curvature (for interstate and primary system roads) as covariates to enhance crash prediction. The models were then used to estimate and compare the potential benefits of deploying conventional asphalt overlays and high friction surface treatments across the construction district at areas with low pavement friction to improve friction and reduce wet weather and skidding crashes.
The guide also discusses the justification for maintaining a comprehensive pavement friction management program and collecting continuous friction data as a result of the effort’s contribution to safety improvements.
    
          **Tool Type:**
        Informational Guide
    
    
    
          **Owner Source:**
        state
    
          **Sponsor/Owner:**
        Virginia Department of Transportation (VDOT)
    
        **Published:**
      2016
    
        **Availability:**
      The information guide is free of charge at the following link: Continuous Friction Measurement Equipment as a Tool for Improving Crash Rate Prediction - A Pilot Study
    
          **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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