AREA TRAFFIC CONTROL IN GLASGOW

AN EXPERIMENT WAS CONDUCTED TO DETERMINE (1) WHETHER CENTRALIZED COMPUTER-ORIENTED CONTROL OF A TRAFFIC NETWORK IS WORTHWHILE, AND (2) WHAT TYPE OF SYSTEM PRODUCES THE GREATEST BENEFITS IN TERMS OF REDUCTION OF TOTAL JOURNEY TIME SPENT BY VEHICLES IN THE NETWORK. A STANDARD CONTROL SCHEME CONSISTING OF THREE FIXED-TIME PLANS FOR MORNING AND EVENING PEAKS AND OFF-PEAK CONDITIONS IS FIRST COMPARED WITH AN EXISTING, NON-COMPUTERIZED SYSTEM. THREE ALTERNATE SCHEMES ARE THEN COMPARED WITH THE STANDARD. WHEN COMPARED WITH THE EXISTING LOCAL CONTROL SCHEME, THE "STANDARD," THE LINKED CONTROL SYSTEM PRODUCED A DECREASE OF TWELVE PERCENT IN AVERAGE JOURNEY TIME (IN VEHICLE-HOURS/HOUR). A FURTHER IMPROVEMENT OF FIVE PERCENT WAS REALIZED WHEN THE SIGNALS WERE LINKED ON A FIXED-TIME BASIS WITH ALLOWANCE FOR FLOW INTERACTION BETWEEN SUCCESSIVE SECTIONS OF ROADWAY. THE LAST TWO SCHEMES TRIED TO DATE, WHICH SUPERIMPOSED A VEHICLE- RESPONSIVE SYSTEM ON THE BASIC LINKING, SHOWED NO FURTHER IMPROVEMENT. /BPR/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00410683
• Supplemental Notes:
  • Vol 11, pp 220-223
• Authors:
  • Holroyd, J
  • Hillier, J A
• Publication Date: 1969-9

Media Info

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

Subject/Index Terms

• TRT Terms: Alternatives analysis; Information processing; Peak hour traffic; Traffic control; Traffic flow; Traffic signal timing; Travel time
• Old TRIS Terms: Traffic control systems
• Subject Areas: Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00225666
• Record Type: Publication
• Source Agency: Traffic Systems Reviews & Abstracts
• Files: TRIS
• Created Date: May 13 1970 12:00AM