EFFECTS OF DESIGN ALTERNATIVES ON QUALITY OF SERVICE AT SIGNALIZED DIAMOND INTERCHANGES

This paper examines the effects of minimum phase length and variations in the spatial arangement of ramp intersections on the capacity of diamond interchanges operated with 4-phase-overlap signalization. The introduction of practical minimum constraints on phase lenghts can significantly alter the performance characteristics of this type of interchange. This paper also illustrates a method by which interchange design can be assessed in terms of quality-of-service measures. A computer program, written in FORTRAN IV, was developed to speed up the analysis. Examination of some typical cases illustrates that an efficient design can be selected if one uses the program for a given set of minimum green-phase lengths and traffic demands.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1975/538/538-003.pdf
• Summary URL:
  • https://scholar.google.com/scholar_lookup?title=EFFECTS+OF+DESIGN+ALTERNATIVES+ON+QUALITY+OF+SERVICE+AT+SIGNALIZED+DIAMOND+INTERCHANGES&author=C.+Messer&author=D.+Berry&publication_year=1975
• Availability:
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• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Highway Capacity and Quality of Service. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Messer, Carroll J
  • Berry, David J
• Conference:
  • 54th Annual Meeting of the Transportation Research Board
  • Location: Washington District of Columbia
  • Date: 1975-1-13 to 1975-1-17
• Publication Date: 1975

Media Info

• Media Type: Print
• Features: Figures; References;
• Pagination: pp 20-31
• Monograph Title: Capacity and Quality of Service
• Serial:
  • Transportation Research Record
  • Issue Number: 538
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Analysis; Computer programs; Design; Diamond interchanges; Interchange ramps; Level of service; Signalized intersections
• Uncontrolled Terms: Capacity
• Old TRIS Terms: Freeway entrances and exits; Freeway ramps
• Subject Areas: Design; Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00127140
• Record Type: Publication
• ISBN: 0309023890
• Files: TRIS, TRB
• Created Date: Jan 14 1976 12:00AM