 Fast / Slow Line Layout
May be a silly question, but why are fast and low lines laid out as they
are.
What I mean is this, on some routes the layout seems to be Up Slow, Up fast,
Down Fast, Down Slow,
but on other routes it more like Up Slow, Down Slow, Up Fast, Down Fast.
Is there a reason for the difference, or is it just one of those things that
has happened over time.
Just curious,
J
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