A QUEUE DETECTION AND QUEUE WARNING SYSTEM

THIS ARTICLE GIVES AN ACCOUNT OF A NEW QUEUE DETECTION AND WARNING SYSTEM THAT HAS BEEN DEVELOPED IN THE NETHERLANDS TO PREVENT THE NOSE-TO-TAIL COLLISIONS THAT ARE THE FREQUENT RESULT OF THE FORMATION OF QUEUES OF STATIONARY TRAFFIC IN UNEXPECTED PLACES. THE AUTHORS DISCUSS THE BASIC REQUIREMENTS OF SUCH A SYSTEM, WHICH NEEDS TO GIVE ADVANCE WARNING OF A LIKELY BUILD-UP OF A QUEUE AS WELL AS THE PRESENCE OF A QUEUE ITSELF. THE METHODS OF QUEUE DETECTION AVAILABLE ARE DISCUSSED AND DETAILS GIVEN OF THE PARTICULAR METHOD THAT THEY HAVE USED. THIS EMPLOYS A DOUBLE LOOP DETECTOR IN THE ROAD WHICH MEASURES BOTH VEHICLE SPEED AND HEADWAY, THESE MEASUREMENTS AUTOMATICALLY UP-DATE A RECORD OF AVERAGE SPEED AND INTENSITY. DETAILS ARE ALSO GIVEN OF THE WAY IN WHICH THE SYSTEM MAKES USE OF THIS INFORMATION TO PROVIDE WARNING, ATTENTION BEING GIVEN TO WAYS OF AVOIDING UNNECESSARY WARNINGS AND OSCILLATION BETWEEN TWO CLASSES OF CONDITION. ADDITIONAL FEATURES DESCRIBED INCLUDE METHOD OF COMPARING DIFFERENT TRAFFIC LANES, THE NEED FOR COMPATIBILITY WITH EXISTING SPEED RESTRICTIONS AND THE AVOIDANCE OF HARM RESULTING FROM FAULTY DETECTOR PULSES. BRIEF NOTES ARE GIVEN ON THE IMPLEMENTATION OF THE SYSTEM AT TWO TYPES OF SITE. FIRST EXPERIENCES ARE SAID TO GIVE VERY POSITIVE RESULTS. PARTICULARLY IN COMPARISON WITH THE EARLIER METHOD OF QUEUE DETECTION BY COUNTING SLOW VEHICLES.

  • Availability:
  • Corporate Authors:

    American Bar Association

    29 Newman Street
    London W1P 3PE,   England 
  • Authors:
    • JENEZON, J H
    • KLIJNHOUT, J J
  • Publication Date: 1974-4-5

Media Info

  • Features: Figures;
  • Pagination: p. 552-553
  • Serial:
    • Urban Lawyer
    • Volume: 15
    • Issue Number: 12/1
    • Publisher: American Bar Association
    • ISSN: 0042-0905

Subject/Index Terms

Filing Info

  • Accession Number: 00080859
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Mar 26 1975 12:00AM