Could someone point me to publications about this in journals with impact
factor larger than 0.01

Thanks,
Rui


On Mon, 22 Jan 2007 12:25:26 +0000, Professor Bill Hillier
<[log in to unmask]> wrote:

>Dear Chengke LIU - When Alain Chiaradia of Space 
>Syntax Limited analysed the traffic engineering 
>data for Nantes in France, he also found little 
>correlation at low radius. However, with each 
>increase in radius the correlation improved and I 
>think eventually reach .8 at radius-n. We think 
>the reason for this is that even when it includes 
>minor roads, traffic engineering data is normally 
>very skewed towards towards more integrated 
>lines, and movement on these lines can be 
>expected in general to reflect longer trips and 
>so be expected to correlate better with higher 
>rather than lower radius (see Penn et al 1998 
>Configurational modelling of urban movement 
>networks in Environment and Planning B).
>
>But, as you say, it is of course also the case 
>that movement on the main networks is more 
>subject to management and control factors than, 
>say, the street pattern of a local area, and this 
>may well affect things - as of course will your 
>not mapping the pattern of connections as they 
>really are.
>
>Two points of clarification. First, see Hillier 
>et al (2000) Self-generated neighbourhood 
>consolidation in informal settlements, Urban 
>Design International  5, 2 61-96 for a study of 
>vehicular movement in Santiago, Chile,
>
>Second, the aim of space syntax has always been 
>to show the independent impact of spatial 
>configuration on movement, but of course many 
>other factors shape movement, and to give a 
>fuller account of real movement rates these 
>factors can be built into the regression model, 
>as in the Penn reference. However, it is better 
>deal with space separately, since only in this 
>way can we isolate the effect of spatial design 
>on movement, and the consequences of this in 
>subsequent development like the influence of 
>movement rates on land use patterns - as shown 
>for example in the Santiago study cites above. 
>These effects are likely to follow in different 
>degrees from any level of correlation between 
>spatial configuration and movement.
>
>However, referring to other correspondents, I do 
>not see how the correlations found in Hillier & 
>Iida (2005) Network effects and psychological 
>effects: a theory of urban movement in eds Cohn A 
>& Mark D Spatial Information Theory  Lecture 
>Notes in Computer Science 3603, Springer Verlag, 
>pp 473-490 can be called anything other than 
>remarkable for single variables. They also of 
>course show unambiguously that it is geometric 
>and topological factors, not metric factors, that 
>shape movement at all but the most localised 
>levels in the urban grid. - Bill
>
>
>
>
>
>
>>Dear Professor Alan Penn
>>
>>Thanks for your quick reply. I still have some questions to your comments.
>>
>>1.The input traffic flow data – I got 308 counting stations on both major
>>roads and minor roads covering Kowloon, the number of sample axial lines is
>>214. I do think they can cover the range of both traffic flow and spatial
>>configuration variables. I was told the traffic flow data was collected by
>>sensor belts installed on the ground road. But I am not sure the detail of
>>data collecting. Does that really matter? Actually the data I used was got
>>from The Annual Traffic Census 2005, published by Hong Kong Transportation
>>Department. According to your words, both the hand gathered and automated
>>gathered data have some problem, what data should I use for this kind of
>>research.
>>
>>2.The axial mapping – It’s obviously not an easy process to ensure all the
>>underpass and over pass are disconnected, especially in Hong Kong. But even
>>they are not, the correlation would not be so bad, if the spatial
>>configuration really matters.
>>
>>
>>3.Attribution of multiple counts to a single line segment. Some stations
>>locate along one axial line, what do you mean by putting these in as
>>separate data points in the stats to start with.
>>
>>Your advices are really helpful, I wish I could get more. Thanks
>