RELATIONSHIPS BETWEEN OCCUPANCY AND DENSITY REFLECTING AVERAGE VEHICLE LENGTHS

The linearity of the occupancy-density relationship is investigated by studying the relationship mathematically across a wide range of traffic situations as well as by plotting values of both variables on the occupancy-density diagram. The literature does not show general agreement on the linearity of the relationship. The relationship is shown to be practically linear because the nonlinear factor mathematically derived does not have noticeable effects on the linearity of the relationship. However, the plot of both variables on the occupancy-density diagram shows that the relationship is influenced by varying average vehicle lengths and can be interpreted as being either linear or nonlinear. The proportion of long vehicles (trucks) is tested empirically and is shown to have large effects on the linearity of the relationship.

• Record URL:
  https://doi.org/10.3141/1883-10
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=RELATIONSHIPS+BETWEEN+OCCUPANCY+AND+DENSITY+REFLECTING+AVERAGE+VEHICLE+LENGTHS&author=Y.+Kim&author=F.+Hall&publication_year=2004
• Availability:
  • Find a library where document is available. Order URL: http://www.trb.org/Main/Public/Blurbs/155481.aspx
• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1883, Traffic Flow Theory and Highway Capacity and Quality of Service 2004.
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Kim, Y
  • Hall, F L
• Publication Date: 2004

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 85-93
• Monograph Title: TRAFFIC FLOW THEORY AND HIGHWAY CAPACITY AND QUALITY OF SERVICE 2004
• Serial:
  • Transportation Research Record
  • Issue Number: 1883
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Diagrams; Lane occupancy; Linearity; Mathematical relations; Traffic density; Trucks; Vehicle length
• Subject Areas: Highways; Motor Carriers; Operations and Traffic Management; I71: Traffic Theory;

Filing Info

• Accession Number: 00983362
• Record Type: Publication
• ISBN: 030909478X
• Files: TRIS, TRB, ATRI
• Created Date: Dec 21 2004 12:00AM