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
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