New Chapter 26 for the Highway Capacity Manual: "Interchange Ramp Terminals"

Diamond interchanges, partial cloverleaf interchanges and single point urban interchanges have been basic freeway design since freeways were first constructed. However, until recently, no accepted methodology was available to help reviewing agencies know whether or not the interchange operations analyses presented to them were reliable. In a newly approved chapter of the Highway Capacity Manual, a procedure has been developed to analyze these interchanges. The new chapter incorporates characteristics that are unique to interchanges and includes: redefining levels of service A to F to better reflect the types of delays encountered at interchanges; origin-destination characteristics of turning movements at interchanges; operational effects of intersection spacing; lane utilization for both through and turning movements at an interchange; demand starvation; and interchange type selection analysis to help determine the impacts of changing interchange types. Two types of analyses for signalized interchanges are supported in the new chapter: final design and operational analysis.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/614107147
• Authors:
  • Marcuson, Joel K
  • Elefteriadou, Lily
  • Dowling, Richard
• Publication Date: 2007-6

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Tables;
• Pagination: pp 40-44
• Serial:
  • ITE Journal
  • Volume: 77
  • Issue Number: 6
  • Publisher: Institute of Transportation Engineers (ITE)
  • ISSN: 0162-8178
  • Serial URL: https://www.ite.org/publications/ite-journal/

Subject/Index Terms

• TRT Terms: Analysis; Freeways; Highway capacity; Highway design; Highway operations; Interchange elements; Interchanges; Lane distribution; Level of service; Methodology; Origin and destination; Ramps (Interchanges); Traffic delays; Travel demand; Turning traffic; Vehicle spacing
• Identifier Terms: Highway Capacity Manual
• Subject Areas: Design; Highways; Operations and Traffic Management; Planning and Forecasting; I21: Planning of Transport Infrastructure;

Filing Info

• Accession Number: 01053692
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 9 2007 10:57PM