This report presents the findings from a research project entitled, "Guidelines for Diamond Interchange Control", sponsored by the State Department of Highways and Public Transportation in cooperation with the U.S. Department of Transportation and Federal Highway Administration. The report contains the data collection methods and procedures employed in the study to evaluate the operational effects of stop sign and signal control at diamond interchanges. An assessment of traffic control alternatives is described in terms of operational effects of queues and travel speed. Guidelines for installing signal control at diamond interchanges are provided in terms of internal volume, left turn proportion within internal volume, and the sum of internal and external volume. The specific traffic volume guidelines were developed based on a combination of these variables affecting operational performance. (Author)

  • Supplemental Notes:
    • Research performed in cooperation with Federal Highway Administration Research Study Title: Guidelines for Diamond Interchange Control.
  • Corporate Authors:

    Texas Transportation Institute

    Texas A&M University System, 1600 E Lamar Boulevard
    Arlington, TX  United States  76011

    Texas State Department of Highways & Public Transportation

    Transportation Planning Division, P.O. Box 5051
    Austin, TX  United States  78763

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Chang, M-S
    • Messer, C J
  • Publication Date: 1984-11

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 45 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00395174
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-TX-85-34+344-1 Intrm Rpt.
  • Contract Numbers: Study 2-18-83-344
  • Created Date: Nov 30 1985 12:00AM