The purpose and operation of the detection system using a passive unit mounted under a bus and buried loops in the road powered from roadside equipment is discussed. A brief history of the development of selective detection is given. The system is used in non-segregated flows to give buses a higher priority at traffic signals. Provisions are made to compensate other traffic after a bus priority sequence has operated and ensure that buses do not take complete control of a junction. The effect on the travelling public, motorists and pedestrians is examined. It is estimated that a high rate of return will be obtained with benefits to public transport and private vehicles making more efficient use of junctions outweighing the slight disbenefits to motorists on non-priority approaches. The cost of providing bus priorities by bus-lanes or any other means is far greater. The Swansea System, the first operational system in Europe will be closely monitored and modified if required. /TRRL/

  • Corporate Authors:

    Institution of Mechanical Engineers

    1 Birdcage Walk
    London SW1H 9JJ,   England 
  • Authors:
    • Ward, W J
    • Heys, J S
  • Publication Date: 1978-7

Media Info

  • Features: Figures; Photos; References;
  • Pagination: p. 197-200
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00188381
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Mar 28 1981 12:00AM