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Using Geometry to Evaluate Strategic Road Proposals in Orbital-Radial Cities

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  • Les Mayhew

    (Department of Geography, Birkbeck College, University of London, 7-15 Gresse Street, London, WIP 2LL, UK, L.Mayhew@geog.bbk.ac.uk)

Abstract

This paper uses geometry to evaluate major road proposals in cities with road networks consisting of orbital and radial routes. The type of geometry used is a development of the Karlsruhe or Moscow metric after the cities where it was identified, although the results have wider applicability. The paper begins with a detailed consideration of the relationship between route speeds, junction access and service areas. New urban patterns are presented using optimal space-filling techniques in which the aim is to maximise drive-time coverage with the minimum number of junctions. The method is then refined to allow for effects such as congestion and interstitial access. The results are then used in a case study to evaluate a well-known strategic road plan for London first proposed in the 1940s. There follows a general discussion about the policy and planning implications for London and further possible developments of the techniques presented.

Suggested Citation

  • Les Mayhew, 2000. "Using Geometry to Evaluate Strategic Road Proposals in Orbital-Radial Cities," Urban Studies, Urban Studies Journal Limited, vol. 37(13), pages 2515-2532, December.
    • Handle: RePEc:sae:urbstu:v:37:y:2000:i:13:p:2515-2532
    DOI: 10.1080/00420980020080671
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