COMPARISON OF METHODS TO DETERMINE INTERSECTION SERVICE LEVEL (ABRIDGEMENT)

This comparative study made paired observations of service level calcualtions by the critical movement summation (CMS) and the Highway Capacity Manual (HCM) methods, at selected at-grade intersections, to determine the similarity of the service levels. The HCM method and the CMS method produced different results for intersection analyses as indicated by the Wilcoxon statistical test. The service levels calculated by the HCM method for intersections are usually inferior to those calculated by the CMS method. The service levels calculated by the HCM and CMS methods appear to be closer when the intersection is signalized and flowing at levels E (1451 to 1600 vehicles/h) or F (greater than 160). A questionnaire survey revealed that the majority of respondents used the HCM method or related charts for at-grade service level determination; the sampling techniques used by most respondents for determining various HCM factors were single sample and judgement; exposure to the CMS method is very limited and exists primarily in the eastern U.S.; and those who use CMS method judge it easy to use and to communicate.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/trr/1976/615/615-006.pdf
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=COMPARISON+OF+METHODS+TO+DETERMINE+INTERSECTION+SERVICE+LEVEL+(ABRIDGEMENT)&author=R.+Trout&author=R.+Loutzenheiser&publication_year=1976
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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:
  • Trout, Raymond S
  • Loutzenheiser, Roy C
• Conference:
  • 55th Annual Meeting of the Transportation Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1976-1-19 to 1976-1-23
• Publication Date: 1976

Media Info

• Media Type: Digital/other
• Features: References;
• Pagination: pp 28-29
• Monograph Title: Capacity and measurement of effectiveness
• Serial:
  • Transportation Research Record
  • Issue Number: 615
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Alternatives analysis; Intersections; Level of service; Sampling; Signalized intersections; Traffic flow
• Uncontrolled Terms: Comparative analysis
• Subject Areas: Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00162980
• Record Type: Publication
• ISBN: 0309025915
• Files: TRIS, TRB
• Created Date: Oct 13 1977 12:00AM