The concept of level of service has been widely used in assessing traffic performance for various road and traffic conditions. For rural roads, however, the existing definitions have a number of deficiencies which make them difficult to apply to many current road problems. This paper considers some of these deficiencies, and suggests a new set of criteria based on traffic bunching (or platooning). Bunching has the advantages of being easy to measure in the field, and closely reflecting the quality of traffic service as perceived by the driver. It can be measured at a point as the percentage of vehicles following in bunches, or over a journey as the percentage of time spent following. Observed traffic bunching at four rural highway locations was compared with simulated bunching for the same conditions, and a fairly close agreement was found. The simulation was then used to determine bunching criteria which correspond to the traditional level of service definitions. The suggested maximum point bunching criteria for levels a, b, c and d were 30, 65, 75 and 80 per cent. The use of these criteria in practical applications is discussed. (Author/TRRL)

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  • Supplemental Notes:
    • This paper was presented during the 12th Australian Road Research Board Conference, Hobart, Tasmania, 27-31 August 1984.
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    Melbourne, Victoria  Australia 
  • Authors:
    • Hoban, C J
  • Publication Date: 1984

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 117-131
  • Serial:

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Filing Info

  • Accession Number: 00393466
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ITRD, TRIS, ATRI
  • Created Date: Jul 31 1985 12:00AM