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                Unsignalized Intersection Improvement Guide (UIIG)
**Description:**
        The Unsignalized Intersection Improvement Guide (UIIG) contains practical guidance for improving the safety, mobility, and accessibility at unsignalized intersections including stop-control, yield-control, no control, and roundabout intersections, as well as other unsignalized intersection types.
The UIIG includes two parts – an information guide and a toolkit. The information guide contains information about the various types of unsignalized intersections, common safety problems, types of treatments, traffic control type alternatives, and related policy. The toolkit provides users with various forms, tools, and other resources for implementing projects and improving programs. One of the tools is the UIIG Treatment Selection Tool, which guides users through selecting appropriate safety improvements from a list of seventy-five engineering and enforcement treatments.  Each countermeasure is accompanied by a one-page fact sheet that lists the target crash types, problems and conditions addressed by the treatment, and considerations and contraindications for users to review.
    
          **Tool Type:**
        Information Source
    
    
    
          **Owner Source:**
        organization
    
          **Sponsor/Owner:**
        National Cooperative Highway Research Program (NCHRP); Institute of Traffic Engineers (ITE)
    
        **Published:**
      2015
    
        **Availability:**
      The guide and toolkit are free of charge at the following link:Unsignalized Intersection Improvement Guide
    
          **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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