AN EVALUATION OF SCATS MASTER ISOLATED CONTROL

The effectiveness of SCATS Master Isolated (SMI) control for non-coordinated signalised intersections was evaluated using vehicle-by-vehicle simulation including an evaluation of the effects of detector failure, as well as field surveys. Various SCATS-like adaptive control algorithms were developed and tested through extensive simulation tests with a wide range of demand flow patterns and a large number of control parameter combinations. Traditional vehicle-actuated and fixed-time control were also evaluated. The results for Algorithm 9, which was closest to the SMI method, and the traditional vehicle-actuated control method are presented in this paper. A new survey method was developed, trialled and used for the surveys. The overall conclusion is that SMI control gives better intersection performance than traditional VA control. The SMI green splits based on the equal degree of saturation principle tend to favour major movements. Evaluation of various detector failure cases indicated substantial benefits from the SCATS Master Isolated control method in terms of all performance measures considered. Longer cycle times, higher degrees of saturation and substantially longer delays (including minor movements) and queue lengths were observed with the traditional VA control. (a) For the covering entry of this conference, please see IRRD abstract no. 492019.

• Record URL:
  • http://arrbknowledge.com
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0869107836
• Corporate Authors:

  ARRB

  Melbourne, Victoria  Australia 
• Authors:
  • Akcelik, R
  • BESLEY, M
  • Chung, E
• Conference:
  • ARRB TRANSPORT RESEARCH LTD CONFERENCE, 19TH, 1998, SYDNEY, NEW SOUTH WALES, AUSTRALIA
• Publication Date: 1998

Language

• English

Media Info

• Features: References;
• Pagination: 1-24 (SESSION A)

Subject/Index Terms

• TRT Terms: Conferences; Detectors; Failure; Highway capacity; Intelligent transportation systems; Intersections; Performance; Traffic actuated controllers; Traffic control; Traffic delays; Traffic flow; Traffic signal cycle; Traffic signals; Travel time; Trip length; Vehicles
• ITRD Terms: 643: Capacity (road, footway); 8531: Case study; 8525: Conference; 576: Cycle (traffic signals); 9010: Delay; 5910: Durability; 5520: Failure; 697: Journey time; 455: Junction; 6120: Sensor; 654: Traffic control; 671: Traffic flow; 565: Traffic signal; 1255: Vehicle; 557: Vehicle actuated
• Subject Areas: Highways; Operations and Traffic Management; Vehicles and Equipment;

Filing Info

• Accession Number: 00769963
• Record Type: Publication
• Source Agency: ARRB
• ISBN: 0-86910-783-6
• Files: ITRD, ATRI
• Created Date: Oct 7 1999 12:00AM