CITRAC - THE APPLICATION OF CENTRALLY INTEGRATED TRAFFIC CONTROL IN GLASGOW

This paper describes the existing area traffic control system and the studies leading to the implementation of new methods of integrated traffic control. A description is given of the system introduced in September 1980 for the control of the Glasgow urban motorway network. The system carries a high volume of local and city by-pass traffic. One particular section, a dual five-lane carriageway carries 115000 vehicles per day and has eleven entry and exit ramps within a distance of half a mile. The computerised traffic control system comprises a central control linked to 374 signalling units incorporated into 99 overhead gantries via computerised outstations. Up to 14 lane destination and warning signals can be displayed on each unit. Each lane has individual signalling and the system automatically generates the relevant signs upstream and across lanes as far as necessary for safe conditions. Motorway surveillance is by a 24-camera closed-circuit TV system; the cameras used can be remotely panned, tilted and zoomed. Examples are given of the lead-in and count-down sequences for the implementation of specific restrictions. A general description is given of the hardware, and future developments are outlined. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00410683
• Corporate Authors:

  Printerhall Limited

  29 Newmart Street
  London W1P 3PE,   England 
• Authors:
  • Mowatt, A
• Publication Date: 1980-11

Media Info

• Features: Figures; Photos;
• Pagination: p. 518
• Serial:
  • Traffic Engineering & Control
  • Volume: 2
  • Issue Number: 11
  • Publisher: Hemming Group, Limited
  • ISSN: 0041-0683
  • Serial URL: http://www.tecmagazine.com/

Subject/Index Terms

• TRT Terms: Access roads; Area traffic signal control; Bypasses; Cameras; Closed circuit television; Digital computers; Equipment; Freeways; Highway capacity; Implementation; Near midair crashes; Networks; Ramps; Roads; Surveillance; Television; Traffic control; Traffic flow; Traffic lanes; Traffic signal control systems; Traffic signs; Traffic volume; Urban areas; Warning systems
• Uncontrolled Terms: Hardware; Road networks
• Geographic Terms: United Kingdom
• ITRD Terms: 435: Access road; 669: Area traffic control; 8673: Digital computer; 3674: Equipment; 597: Linked signals; 2752: Motorway; 1642: Near miss; 9101: Surveillance; 6949: Television; 671: Traffic flow; 8119: United Kingdom; 313: Urban area
• Subject Areas: Highways; Operations and Traffic Management; Research; I73: Traffic Control;

Filing Info

• Accession Number: 00334994
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Sep 16 1981 12:00AM