Existing systems for automatically counting traffic have proved to be unreliable, especially in heavily trafficked urban areas. For several months the London Borough of Camden have been developing a new system for undertaking counts at temporary sites. The development work has been concerned with both the detector and the recorder. Advances in inductive loop detection have meant that at permanent sites, where the loops are buried beneath the carriageway surface, highly accurate counts have been produced. Extensive tests showed that a single turn metallic tape loop with inductances connected in series is durable enough to withstand the wear and tear of traffic for at least one week when on the carriageway. The results given for two typical loop configurations compared with manual counts show excellent agreement. The recorder was specified to produce printed paper tape giving details of the time and vehicle flow. Power for the detectors was supplied by two dry cell batteries. Full details of both the metallic tape detectors and the recorder are given. The results of the experiments and tests carried out to date have demonstrated the accuracy and feasibility of this system. /TRRL/

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  • Corporate Authors:

    Printerhall Limited

    29 Newmart Street
    London W1P 3PE,   England 
  • Authors:
    • Hodgkinson, D H
    • Reinke, D B
  • Publication Date: 1974-6

Media Info

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Filing Info

  • Accession Number: 00096719
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Oct 18 1975 12:00AM