Highway Capacity Manual Guidance for Alternative Intersections
Project Information
Project ID:
FHWA-PROJ-13-0075
Project Abstract:
Over the past decade, the Federal Highway Administration (FHWA) has conducted and developed extensive research, workshops, technical briefs, and other outreach materials about alternative intersections/interchanges. These research efforts and publications have increased interest and rapid adoption of alternative geometric designs across the United States. Of the many alternative intersection/interchange designs, stakeholders showed significant interest in these four: double crossover diamond (DCD) interchange (or diverging diamond interchange (DDI)); displaced left turn (DLT) intersection; median u-turn (MUT) intersection; and restricted crossing u-turn (RCUT) intersection.
Most existing analysis tools supporting the adoption of alternative intersections/interchanges involve the use of complex microscopic simulations that are expensive and time- consuming. The Highway Capacity Manual (HCM) and highway capacity software (HCS) are widely used analytical tools that assess the quality of service for conventional intersections and interchanges. However, they do not assess any of the alternative designs considered in this project. To support the increased exposure and interest in these designs, FHWA is conducting activities to integrate alternative intersection/interchange guidance into the HCM and HCS. This will help expand the portfolio of design alternatives contained in the HCM and enable a side-by-side assessment of their operations in contrast to traditional designs.
Goals:
To develop HCM analysis procedures for evaluating capacity and quality of service of the DCD interchange (aka, DDI, DLT intersection, MUT intersection, and RCUT intersection). These procedures or guides should include extensions of HCM methods to address gaps in the HCM relevant to the operations of these advanced intersection types.
Research HUB ID:
7917
Project Status:
Completed
Project Funding Amount (Contract Award Amount):
$810,527.00
Start Date:
End Date:
Public Access Plan:
No
Laboratory:
Grant/Contract ID:
- DTFH61-12-D-01020
FHWA Program Area:
- Operations
Fiscal Year / AMRP Program / AMRP Activity:
- FY 2002-2022 / Operations / Transportation Systems Management and Operations
AMRP = Annual Modal Research Plan
Contact Information
First Name:
Randy
Last Name:
VanGorder
Phone Number:
(202) 493-3266
Email Address:
Team:
Office of Safety and Operations Research and Development
Office:
Office Code:
HRSO-01
Management Organizations
Sponsor Organization
Organization Role:
Sponsor Organization
Organization:
Federal Highway Administration: Office of Research, Development and Technology - Office of Safety and Operations Research and Development
Contact Role:
Project Lead
Contact:
Managing Organization
Organization Role:
Project Managing Organization
Organization:
Federal Highway Administration: Office of Research, Development and Technology - Office of Safety and Operations Research and Development
Contact Role:
Project Contact
Contact:
Performing Organization
Organization Role:
Performing Organization
Organization:
Leidos
Partners and Other Sponsor/Managing/Performing Organizations
Organization Role:
Partner: Advisory
Organization:
Federal Highway Administration: Office of Operations - Office of Transportation Management
Organization Role:
Partner: Advisory
Organization:
Federal Highway Administration: Resource Center
Organization Role:
Partner: Advisory
Organization:
Federal Highway Administration: Office of Safety
Organization Role:
Partner: Advisory
Organization:
Alabama Department of Transportation
Organization Role:
Partner: Advisory
Organization:
California Department of Transportation
Organization Role:
Partner: Advisory
Organization:
Colorado Department of Transportation
Organization Role:
Partner: Advisory
Organization:
Florida Department of Transportation
Organization Role:
Partner: Advisory
Organization:
Missouri Department of Transportation
Organization Role:
Partner: Advisory
Organization:
North Carolina Department of Transportation
Organization Role:
Partner: Advisory
Organization:
Nevada Department of Transportation
Organization Role:
Partner: Advisory
Organization:
Ohio Department of Transportation
Organization Role:
Partner: Advisory
Organization:
Washington State Department of Transportation
Organization Role:
Partner: Advisory
Organization:
Wisconsin Department of Transportation
Deliverables
Links to Project Reports: