The development of a mathematical programming technique as a design tool for traffic management

Wackrill, Patricia Anne (1990) The development of a mathematical programming technique as a design tool for traffic management. PhD thesis, Middlesex Polytechnic. [Thesis]

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In urban areas, competition for road space at junctions is one of the major causes of congestion and accidents. Routes chosen to avoid conflict at junctions have a mutually beneficial effect which should improve circulation and reduce accidents. A prototype design tool has been developed to provide for traffic management based on such routes.
The mathematical model behind the design tool works with a given road network and a given O-D demand matrix to produce feasible routes for all drivers in such a way that the weighted sum of potential conflicts is minimised. The result is a route selection in which all journeys from origin i to destination j follow the same route.
The method which works best splits the problem into single commodity problems and solves these repeatedly by the Out-of-Kilter algorithm. Good locally optimal solutions can be produced by this method, even though global optimality cannot be guaranteed. Software for a microcomputer presented here as part of the design tool is capable of solving problems on realistic networks in a reasonable time.
This method is embedded in a suite of computer programs
which makes the input and output straightforward. Used as a design tool in the early stages of network design it gives a network-wide view of the possibilities for reducing conflict and indicates a coherent set of traffic management measures. The ideal measure would be automatic route guidance, such as the pilot scheme currently being developed for London. Other measures include a set of one-way streets and banned turns. The resulting turning flows could be used as input to the signal optimiser TRANSYT to determine signal settings favouring the
routeing pattern.
The project was funded by the S. E. R. C. and carried out at Middlesex Polytechnic in collaboration with MVA Systematica.

Item Type: Thesis (PhD)
Additional Information: Thesis submitted in partial fulfilment of the requirements of the Council for National Academic Awards for the degree of Doctor of Philosophy.
Research Areas: B. > Theses
A. > School of Science and Technology > Design Engineering and Mathematics
Item ID: 10676
Depositing User: Adam Miller
Date Deposited: 18 Jul 2013 07:04
Last Modified: 21 Jun 2021 16:45

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