Access Management in the Vicinity of Interchanges

Interchanges are a crucial component of the highway system, providing access to the local street system and accommodating development. Local traffic becomes concentrated in the vicinity of interchanges, stimulating additional development. Operational and safety problems can result when driveways and intersections on crossroads are spaced too closely to interchange terminals. Transportation agencies use access management techniques to balance the required mobility of a roadway facility with the accessibility needs of the adjacent land users. In 2004, TRB published NCHRP Synthesis 332: Access Management on Crossroads in the Vicinity of Interchanges. This report documented and compiled best available information and practices at the time. Since 2004 there have also been advances in intersection and interchange types and new resources to estimate safety and operational impacts. Synthesis 332 also identified research gaps that limit the ability of transportation professionals to successfully implement sound access management practices. Addressing these research needs and incorporating current knowledge could greatly benefit transportation professionals involved in access management decisionmaking. There is a need to compile best available current information, conduct additional research, and develop guidelines for access management in the vicinity of interchanges. The objectives of this research are to develop (1) guidelines for access management in the vicinity of a freeway interchange and (2) text for recommended revisions to relevant manuals such the AASHTO Policy on Geometric Design for Roads and Streets, and the Highway Safety Manual. To the extent possible, the project should also include the development of new crash modification factors associated with access management decisions near interchanges.

• Record URL:
  http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=3396
• Supplemental Notes:
  • Funding is broken down as follows: $575,000 + $375,000 FY 2017 (anticipated).

Language

• English

Project

• Status: Active
• Funding: $950000
• Contract Numbers:

  Project 07-23

• 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:

  Crichton-Sumners, C

• Performing Organizations:

  Texas A&M Transportation Institute, College Station

  Texas A&M University System
  3135 TAMU
  College Station, TX  United States  77843-3135
• Principal Investigators:

  Dixon, Karen

• Start Date: 20130620
• Expected Completion Date: 20191215
• Actual Completion Date: 0
• Source Data: RiP Project 37830

Subject/Index Terms

• TRT Terms: Access control (Transportation); Case studies; Freeways; Geometric design; Guidelines; Highway design; Highway safety; Interchanges; Queuing; Traffic flow; Weaving traffic
• Subject Areas: Design; Highways; Operations and Traffic Management; Safety and Human Factors;

Filing Info

• Accession Number: 01543914
• Record Type: Research project
• Source Agency: Transportation Research Board
• Contract Numbers: Project 07-23
• Files: TRB, RiP
• Created Date: Nov 23 2014 1:00AM