The study of inductive loops for use as stop-line detectors, previously reported to the 9th ARRB conference held in 1978, has now been completed. The choice of a configuration for use with present and future sensors in differing environments has required a range of statistical evaluations of loop performance, assessing the many conflicting requirements of traffic loops. The study has led to the design of a new loop type, the "symmetripole", which combines the best features of other loops and was found to be the most satisfactory all-purpose configuration. The effects of changes in its width, length and proximity to buried reinforcement have been extensively studied. Simple and effective instrumentation has been developed to aid the installation of the symmetripole loop. The substantial increase in knowledge of detector system characteristics has contributed significantly to the development of Australian standards which deal with sensor performance, loop cable and feeder cable. (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.
  • Corporate Authors:


    Melbourne, Victoria  Australia 
  • Authors:
    • MORRIS, D J
    • DEAN, K G
  • Publication Date: 1984

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 26-31
  • Serial:

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Filing Info

  • Accession Number: 00393458
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ITRD, TRIS, ATRI
  • Created Date: Jul 31 1985 12:00AM