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/

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  • Corporate Authors:

    Printerhall Limited

    29 Newmart Street
    London W1P 3PE,   England 
  • Authors:
    • Gartner, N H
    • Little, JDC
    • Gabbay, H
  • Publication Date: 1976-8-9

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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