The next generation of controllers will probably be based on microprocessors. It is important that new designs do not just apply the new-technology to current versions. The article discusses some basic control features essential to efficient signal operation. Schemes designed to achieve a high degree of parallel traffic movement require matching parallel control capabilities. The author examines the efficiency of current UK controllers using samples to illustrate some basic requirements of a new controller design. Although current UK systems are adequate for serial phases, they cannot efficiently control parallel phases because they do not provide facilities for fixed phase objects, minimum green-times on phases and cannot overlap intergreens on parallel phase groups. A closer understanding of the requirements of modern junction design is needed but parallel control techniques are much more efficient and can satisfy most needs. (TRRL)

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  • Corporate Authors:

    Printerhall Limited

    29 Newmart Street
    London W1P 3PE,   England 
  • Authors:
  • Publication Date: 1980-5

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Filing Info

  • Accession Number: 00325191
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Report/Paper Numbers: HS-030 130
  • Files: ITRD, TRIS
  • Created Date: Apr 15 1981 12:00AM