Chenke, Pragmatically - start with one line, no traffic management etc. and see how it works. Don't be surprised if it doesn't work (for all the reasons I gave before) but then, by looking carefully at how it doesn't work, formulate an intelligent mapping strategy that you can apply uniformly to all situations. Alan Penn Professor of Architectural and Urban Computing The Bartlett School of Graduate Studies University College London Gower Street London WC1E 6BT +44 (0)20 7679 5919 [log in to unmask] www.vr.ucl.ac.uk www.spacesyntax.org > > Dear all, > > Thanks Professor Bill Hiller, Alan Penn, and Rui Carvalho for your > valuable > replies. I really gain a lot from your words. As Professor Alan Penn > mentioned in his reply, the road system in Hong Kong is quite complicated, > for example, on some road, there are several traffic lines (drive ways), > which have the same road name, should I use one axial line to represent > them > or is that oversimplified? Please see the attached figure, is that > suitable > to use the highlighted axial line to represent that road? > > Many thanks in advance!