TOWARDS A REVIEW OF THE CONCEPT OF LEVEL OF SERVICE FOR TWO- LANE RURAL ROADS

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. This note considers some of these deficiencies and suggests a new set of criteria based on traffic bunching (or platooning). Bunching appears to closely reflect the quality of rural traffic operations as perceived by the driver, and it has the advantage of being easy to measure in the field. The rural traffic simulation model trarr was used to derive bunching criteria which correspond to the existing level of service definitions. Suggested maximum bunching criteria for levels of service A, B, C and D respectively are 30, 60, 75 and 80 per cent of journey time spent following in bunches. The new criteria were applied to 24 simulated road conditions to derive approximate service volumes for each case. It was found that these were easily defined in terms of bunching and automatically took account of changes in driver expectations on differen road types. (Author/TRRL)

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 216-218
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00381062
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ITRD, TRIS, ATRI
  • Created Date: Apr 30 1984 12:00AM