AREA TRAFFIC CONTROL FOR CENTRAL LONDON

THE ARTICLE DESCRIBES EQUIPMENT WHICH THE GREATER LONDON COUNCIL HAVE ORDERED FROM SIEMENS (U.K) LTD FOR AREA TRAFFIC CONTROL OF 300 SIGNALS IN CENTRAL LONDON; THIS IS THE FIRST PHASE OF THE GLC'S PROJECT FOR CITRAC (CENTRAL INTEGRATED TRAFFIC CONTROL). THE EQUIPMENT PROVIDES FOR FIXED TIME CONTROL OF THE SIGNALS WITH VERY FLEXIBLE ARRANGEMENTS FOR PLANNED CHANGING, AND FOR VEHICLE-ACTUATED INTERACTION BY THE LOCAL CONTROLLERS AND EVENTUALLY BY THE COMPUTERS. DETECTOR INFORMATION WILL BE COLLECTED FROM 500 NEW LOOP DETECTOR SITES AND FROM EXISTING PNEUMATIC DETECTORS. THE EQUIPMENT INCLUDES TWO COMPUTERS TO PROVIDE FLEXIBILITY AND RELIABILITY, CONNECTED VIA POST OFFICE CIRCUITS TO EACH OF THE 300 TRAFFIC SIGNAL CONTROLS. A FREQUENCY DIVISION MULTIPLEX DATA TRANSMISSION SYSTEM IS ENVISAGED. INITIALLY THE EQUIPMENT WILL BE INSTALLED AT COUNTY HALL INSTEAD OF AT A SPECIAL TRAFFIC CONTROL CENTRE, SO THE PROVISION OF DISPLAYS AND WALL MAPS HAS BEEN SEVERELY CURTAILED--ONLY THREE SIMPLE CATHODE RAY TUBE DISPLAYS ARE PROPOSED. /AUTHOR/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00410683
• Supplemental Notes:
  • Vol 12, No 5, PP 233-235, 4 FIG, 5 REF
• Authors:
  • Huddart, K W
  • Chandler, M J
• Publication Date: 1970-9

Media Info

• Serial:
  • Traffic Engineering & Control
  • Publisher: Hemming Group, Limited
  • ISSN: 0041-0683
  • Serial URL: http://www.tecmagazine.com/

Subject/Index Terms

• TRT Terms: Areas; Computers; Pretimed traffic signal controllers; Traffic actuated controllers; Traffic control; Traffic signal controllers; Vehicle detectors
• Old TRIS Terms: Fixed time controller
• Subject Areas: Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00225873
• Record Type: Publication
• Files: TRIS
• Created Date: Dec 7 1970 12:00AM