Highway Capacity Manual Methodologies for Corridors Involving Freeways and Surface Streets

The objective of this research is to develop material for the Highway Capacity Manual (HCM) that allows the analysis of corridors that include freeways and surface streets (e.g., Exhibit 2-1 of the HCM, 6th Edition). The research should emphasize the use of field data (existing and new) for the development and validation of methodologies. The HCM material should be based on the 6th edition of the HCM and include: (1) Performance and service measures for trips within corridors that use both the freeway and surface street facilities (urban streets for urban areas; multilane highways and two-lane highways for rural areas). All affected modes should be considered. (2) An analysis framework, primarily for planning and design purposes, that can be used to estimate the performance measures for alternative designs (including active traffic and demand management and other operational strategies) based largely on 6th edition HCM methodologies. (3) Adjustment factors and recommended modifications for HCM methodologies based on interactions between the freeway and surface street methodologies (e.g., queue spillback from ramp meters and ramp terminals, effects of platooned on-ramp vehicles). (4) Guidance on scoping the analysis, including spatial and temporal boundaries for the analysis corridor. (5) Limitations of the framework and methodologies. Conditions under which other analytical approaches would be more practical should be described. The capability of the framework and methodologies to accommodate demand shifts should be discussed. (6) Data requirements for the use of the framework and methodologies, including techniques for collecting the data. (7) Information on how traffic simulation, dynamic traffic assignment, and other alternative analysis approaches can complement the HCM material including comparing, integrating, and interpreting the analysis results. (8) Guidance on incorporating probe vehicle, crowd-sourced data, and other emerging data sources into the generation of performance measures and validation of analysis results. (9) Example problems illustrating use of the framework and methodologies.


  • English


  • Status: Active
  • Funding: $800000
  • Contract Numbers:

    Project 15-57

  • Sponsor Organizations:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    American Association of State Highway & Transportation Officials (AASHTO)

    444 North Capitol Street, NW, Suite 225
    Washington, DC  United States  20001

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001
  • Project Managers:

    Derr, B

  • Performing Organizations:

    University of Florida Transportation Institute

    2100 NE Waldo Rd.
    Gainesville, FL  United States  32609
  • Principal Investigators:

    Elefteriadou, Lily

  • Start Date: 20160818
  • Expected Completion Date: 20191117
  • Actual Completion Date: 0
  • Source Data: RiP Project 37562

Subject/Index Terms

Filing Info

  • Accession Number: 01543563
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 15-57
  • Files: TRB, RiP
  • Created Date: Nov 18 2014 1:03AM