Variations of the Diverging Diamond Interchange

The Diverging Diamond Interchange (DDI) has shown some distinct advantages over more conventional interchanges with certain traffic movements. The design has the ability to improve traffic operations and safety at a relatively low cost. However, there are instances where a DDI is not the best fit. This can include needed thru movements for ramp traffic, traffic volumes that are not as feasible for the crossover movements, or simply a highway to highway interchange. This paper explores adding additional geometric features to the DDI concept to handle a larger spectrum of uses for the DDI. Several of these diverging diamond “mutations” will be explored in this paper and discussed on a qualitative basis. The new designs are called the Expanded Diverging Diamond Interchange, the Diverging Double Roundabout Interchange, the Diverging Windmill Interchange, and the Diverging Partial Cloverleaf Interchange.

• 
• Corporate Authors:

  Institute of Transportation Engineers (ITE)

  Washington, DC  United States 
• Authors:
  • Chlewicki, Gilbert
• Conference:
  • ITE 2010 Annual Meeting and Exhibit
  • Location: Vancouver , Canada
  • Date: 2010-8-8 to 2010-8-11
• Publication Date: 2010

Language

• English

Media Info

• Media Type: Web
• Features: Figures; References;
• Pagination: 15p
• Monograph Title: ITE 2010 Annual Meeting and Exhibit

Subject/Index Terms

• TRT Terms: Alternatives analysis; Diamond interchanges; Geometric design; Highway design; Highway operations
• Uncontrolled Terms: Diverging diamond interchanges
• Subject Areas: Highways; Operations and Traffic Management; I20: Design and Planning of Transport Infrastructure;

Filing Info

• Accession Number: 01321716
• Record Type: Publication
• Files: TRIS
• Created Date: Nov 30 2010 7:49AM