THE TRAC SYSTEM . URBAN TRAFFIC CONTROL WORKSHOP, 14TH ARRB CONFERENCE, CANBERRA, AUGUST 1988

The traffic responsive area control (trac) system has been developed by the main roads department, queensland to meet the area traffic control requirements of towns and cities. For large cities, a number of regional systems are linked in a network. The traffic control functions are distributed between a regional computer and microprocessor based local traffic signal controllers. The regional computer performs the tasks that relate to the system as a whole, and the local controllers perform the tasks that relate to the intersections. Coordination plans are selected by the regional computer using average detector occupancy information. The plan selected is optimised by the local controller using the current detector data. If the communication between the regional computer and the local controller is lost, the controller 'falls back' to 'cableless linked' operation. The system provides a sophisticated user interface to ensure simple operation and a small training and support requirement. IBM pc's or compatibles can be connected to the system as 'workstations' and they provide high resolution colour graphic displays of the system's operation. The workstations can be connected to any system via dial up or dedicated lines. (Author/TRRL)

• Record URL:
  http://arrbknowledge.com
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0869103733
• Corporate Authors:

  ARRB

  Melbourne, Victoria  Australia 
• Authors:
  • LEES, J J
• Conference:
  • Australian Road Research Board Conference Proc
• Publication Date: 1989-5

Media Info

• Pagination: p. 35-53

Subject/Index Terms

• TRT Terms: Area traffic signal control; Computers; Conferences; Data collection; Detectors; Information processing; Intersections; Management; Towns; Traffic; Traffic signals; Urban areas
• Uncontrolled Terms: Micro
• Geographic Terms: Australia
• ITRD Terms: 155: Administration; 669: Area traffic control; 8006: Australia; 8525: Conference; 8623: Data acquisition; 8655: Data processing; 8673: Digital computer; 455: Junction; 9045: Micro; 6120: Sensor; 755: Traffic; 565: Traffic signal; 313: Urban area
• Subject Areas: Administration and Management; Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00499047
• Record Type: Publication
• Source Agency: ARRB
• ISBN: 0-86910-373-3
• Files: ITRD, TRIS
• Created Date: Sep 30 1990 12:00AM