Brasilia, Brazil, 29 March - 3 April 1999
Dr Ben Croxford
The Bartlett School of Graduate Studies
(Torrington Place Site)
University College London
Gower Street
London WC1E 6BT
England
tel (44) (0)171 380 7890
fax (44) (0)171 813 4363
email b.croxford@ucl.ac.uk
www http://www.spacesyntax.com
This paper presents results from a comparison of results from two transport
models of London. The space syntax model covers an area of over 300km2
with more than 16,000 axial lines, the London Transport origin-destination
matrix model covers a larger area 3000km2 but in less detail with 27,000
links covering all of the major roads in the area. New techniques for
integrating space syntax within a geographical information system (GIS)
allow detailed comparisons to be made between integration values and traffic
flows. The London Transport model includes information on several different
types of vehicle and also average traffic speeds for each link. Using
the GIS it is possible to link measures of how "well" a particular
line is integrated into the system (its integration value) along with
these measured traffic data. Usable street widths can be calculated from
the map for every axial line and linked to the integration value of the
line and this information is linked to the record for the relevant link
in London Transport's model. This work is an important step forward in
producing a simple model for local councils to ask "what-if"
questions about their transport network.
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