CONTROLLER THAT'S ALWAYS ONE MOVE AHEAD

A Zilog z80 microprocessor based traffic signal controller the 66 ad 53x mitrac series has been manufactured by Phillips and evaluated at two sites in Wales. The flexibility of the controller, in which fixed-time plans held in the software can be altered by plugging in a hand-held teletype keyboard, enables it to be specified for any junction and, once the configuration is known the software can be produced in a few weeks. Thus bulk ordering of controllers and consequent cost saving is possible. Hard wired controllers can take over a year to produce and install. At present up to 16 traffic movements can be catered for with a planned development of up to 32. Power supply is monitored so that the system can be shut down in an orderly way if a failure is likely. A standby battery ensures that the contents of the ram are not corrupted. The software also checks the system every 100 ms to ensure that a fault does not cause a dangerous conflict at the junction. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00396303
• Corporate Authors:

  IPC Building and Contract Journals Limited

  Surrey House, 1 Throwley Way
  Sutton, Surrey SM1 4QQ,   England 
• Publication Date: 1982-3-18

Media Info

• Features: Photos;
• Pagination: 16 p.
• Serial:
  • SURVEYOR
  • Volume: 159
  • Issue Number: 4682
  • Publisher: Hemming Group, Limited
  • ISSN: 0039-6303

Subject/Index Terms

• TRT Terms: Computer programs; Costs; Evaluation; Intersections; Microprocessors; Pretimed traffic signal controllers; Signalized intersections; Traffic signal controllers; Traffic signals
• Geographic Terms: United Kingdom
• Old TRIS Terms: Fixed time controller
• ITRD Terms: 577: Fixed time (signals); 455: Junction; 8643: Microprocessor; 8645: Software; 565: Traffic signal; 8119: United Kingdom
• Subject Areas: Finance; Highways; Operations and Traffic Management; I73: Traffic Control;

Filing Info

• Accession Number: 00367152
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Sep 30 1982 12:00AM