Rail × bus
which stations are walked to, and which are bussed to
The rail record sees — stations. The bus record sees — stops. Neither can see the thing between them — that some stations are the end of a bus ride and others are the end of a walk, and that this is most of what separates a centre from a suburb.
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Warm is bus-fed, cool is walked to. Size is morning rail boardings, so the large circles are the places people actually leave from.
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