• Development of a Crash Modification Factor for Conversion of a Conventional Signalized Intersection to a Continuous Flow Intersection

    NCDOT Research Project Number: 2020-29

 Executive Summary

  • ​North Carolina is considered a very progressive state in terms of alternative intersection implementation. The service life of many roadways has been extended because the profession is willing to push the envelope of traditional design to consider alternatives – alternatives that in many cases extend the service life without the need for costly interchange designs. However, many urban and suburban roadways have exhausted the capacity available to serve motorist reasonably. The benefits of traditional widening are not justifiable and far-to-often expensive grade separation is considered as the solution when not necessary.

    This research proposal follows prior research in the unconventional intersection domain which has helped bolster use of promising alternatives that look at possible safety and operational benefits. This project helps build on the current knowledge-base of continuous flow intersections by answering “Are these intersections a safe unconventional design form compared to other design alternatives?" The findings from this research, regardless of the outcome, should help analyst weigh the various trade-offs of design alternatives leading to a more informed design selection that provides the safest, most efficient, and cost effective alternative that meets the publics expectation upon completion.

Christopher Cunningham
Christopher Cunningham; Raghavan Srinivasan
Joseph E. Hummer
Lisa E. Penny
NC State University - ITRE
UNC Chapel Hill - HSRC

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 Report Period

  • August 1, 2019 – July 31, 2021


  • In Progress


  • Traffic, Mobility, Safety and Roadway Design

 Sub Category

  • Facility Design

 Related Links

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