'MOVA': TRAFFIC RESPONSIVE, SELF-OPTIMISING SIGNAL CONTROL FOR ISOLATED INTERSECTIONS

More than half of the uk's 9000-plus signalised junctions are controlled by independently-operated (uncoordinated) signals with green times varying in response to local traffic flows. Mova (microprocessor optimised vehicle actuation) is the new signal control strategy researched and developed by TRRL for such isolated intersections. Data from vehicle detectors on the junction approaches are analysed by an on-line microprocessor implementing the mova program; the durations of the green signals are controlled by a delay-and-stops minimising logic, or, if any approaches become oversaturated (congested), by a capacity-maximising process. Subject to a final large-scale trial, mova is intended as a general replacement for the gap-seeking, d-system vehicle-actuated (Va) control currently in use. This report describes the mova system, its main principles, the development trials which have taken place, and the assessments of benefits due to mova. It is concluded that mova reduces vehicle delay by an average of about 13 per cent throughout the working day, compared with up-to-date d-system Va; further benefits are likely where, as is often the case, critical Va controller settings (maximum green times) are based on out-of-date traffic data. (a)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/02665247
• Corporate Authors:

  Transport and Road Research Laboratory (TRRL)

  Wokingham, Berkshire  United Kingdom 
• Authors:
  • Vincent, R A
  • PEIRCE, J R
• Publication Date: 1988

Language

• English

Media Info

• Pagination: 21 p.
• Serial:
  • TRRL RESEARCH REPORT
  • Issue Number: RR 1
  • Publisher: Transport and Road Research Laboratory (TRRL)
  • ISSN: 0266-5247

Subject/Index Terms

• TRT Terms: Computer programs; Green interval (Traffic signal cycle); Intersections; Microprocessors; Optimization; Prevention; Traffic actuated controllers; Traffic congestion; Traffic control; Traffic delays; Traffic signal cycle; Traffic signals
• Uncontrolled Terms: Decreases; Optimum
• Geographic Terms: United Kingdom
• ITRD Terms: 632: Congestion (traffic); 576: Cycle (traffic signals); 9009: Decrease; 9010: Delay; 599: Green light; 455: Junction; 8643: Microprocessor; 9149: Prevention; 8645: Software; 654: Traffic control; 565: Traffic signal; 8119: United Kingdom; 557: Vehicle actuated
• Subject Areas: Highways; Operations and Traffic Management; Security and Emergencies;

Filing Info

• Accession Number: 00483108
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: 70
• Files: ITRD, TRIS, ATRI
• Created Date: May 31 1989 12:00AM