MITROP: A COMPUTER PROGRAM FOR SIMULTANEOUS OPTIMISATION OF OFFSETS, SPLITS AND CYCLE TIME

Setting traffic signals in an urban street network involves the determination of cycle time, splits of green time and offsets. Existing methods use a sequential procedure for calculating the traffic-control variables. A common cycle time is established first. Then green splits are calculated for each intersection and, finally, offsets among the signals are determined. Since these three computation stages are not really independent, the results are not necessarily optimal. Mitrop (mixed-integer traffic optimisation program) is a new computer method which is designed to optimise simultaneously all the traffic control variables in a network. Both deterministic and stochastic models are used to represent the traffic flow process. The optimisation problem is formulated in terms of mixed-integer linear programming and a globally-optimal solution is determined using IBM's MPSX optimisation system. The method was applied to several traffic signal networks and is shown to offer certain advantages over existing methods.(a) /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:
  • Gartner, N H
  • Little, JDC
  • Gabbay, H
• Publication Date: 1976-8-9

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 355-359
• Serial:
  • Traffic Engineering & Control
  • Volume: 17
  • Issue Number: 8/9
  • Publisher: Hemming Group, Limited
  • ISSN: 0041-0683
  • Serial URL: http://www.tecmagazine.com/

Subject/Index Terms

• TRT Terms: Computer programs; Evaluation and assessment; Green interval (Traffic signal cycle); Mathematical models; Offsets (Traffic signal timing); Optimization; Stochastic processes; Traffic control; Traffic flow; Traffic signal control systems; Traffic signal cycle; Traffic signals
• Uncontrolled Terms: Models; Optimum
• ITRD Terms: 9020: Evaluation (assessment); 6473: Mathematical model; 8645: Software; 6574: Stochastic process; 654: Traffic control; 671: Traffic flow; 565: Traffic signal
• Subject Areas: Data and Information Technology; Highways; Operations and Traffic Management; I73: Traffic Control;

Filing Info

• Accession Number: 00147942
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: May 11 1977 12:00AM