Assessing and Addressing Deficiencies in the HCM Weaving Segment Analyses, Part II – (Project J5)

This proposal describes Phase II of Project K2, titled Assessing and Addressing Deficiencies in the Highway Capacity Manual (HCM) Weaving Segment Analyses. Phase I of this project was limited to the analysis of simple, ramp weaves. It included new data collection at 15 sites in the Southeast and Western US, and a new speed predictive model that avoids much of the complexities in the HCM6 method. The model was found to yield more accurate speed predictions than the current HCM6 methodology. Phase II will extend the work to major weaves. As part of the original Phase I data collection, the research team had already collected volume and geometry data for 14 Type B sites which were not used in that phase. In addition, the team has access to the original NCHRP 03-75 database, which included another 10 Type B weaves. As a result, there will be no new data collection for this weaving configuration in Phase II. . The team proposes to collect a limited set of new data in North Carolina (5-6 sites) for Type C weaving configuration, in order to cover all weaving configurations and enabling the development of new HCM material that is comprehensive across all weaving types.

  • Supplemental Notes:
    • This project is a continuation of Project K2 under the same title.


  • English


  • Status: Active
  • Funding: $123301
  • Contract Numbers:


  • Sponsor Organizations:

    Southeastern Transportation Research, Innovation, Development and Education Center (STRIDE)

    University of Florida
    365 Weil Hall
    Gainesville, FL  United States  32611

    Office of the Assistant Secretary for Research and Technology

    University Transportation Centers Program
    Department of Transportation
    Washington, DC  United States  20590
  • Managing Organizations:

    U.S. Department of Transportation Research and Innovative Technology Administration

    1200 New Jersey Avenue, S.E.
    Washington, DC,     20590
  • Project Managers:

    Tucker-Thomas, Dawn

  • Performing Organizations:

    North Carolina State University, Raleigh

    Department of Civil Engineering, Campus Box 7908
    Raleigh, NC  United States  27695-7908
  • Principal Investigators:

    Rouphail, Nagui

  • Start Date: 20210401
  • Expected Completion Date: 20220430
  • Actual Completion Date: 0
  • USDOT Program: University Transportation Centers

Subject/Index Terms

Filing Info

  • Accession Number: 01768222
  • Record Type: Research project
  • Source Agency: Southeastern Transportation Research, Innovation, Development and Education Center (STRIDE)
  • Contract Numbers: 69A3551747104
  • Files: UTC, RiP
  • Created Date: Mar 25 2021 2:30PM