On Fri, 4 Feb 2005, Mark Brader wrote:

North to south reversals, where the train approaches Euston from Bank,
are not especially difficult ... North to south reversals, where the
train approaches from Camden and then returns to Camden, might be a
little more involved.

This wasn't a typo -- the first "North" means "northbound", while the
second one is in the sense of "north wind", right? grin

Oh, i don't know - i think he meant what he said: "north to south
reversals where the train approaches from Camden and then returns to
Camden might be a little more involved" - rather considerably more
involved, i should think, since there'd have to be south to north
reversals on either side of it to get the directions right!

Of course, the wind interpretation can also be used to dramatically
simplify both north-to-south and south-to-north reversals, by interpreting
one of the directions conventionally and one as a wind direction, thus
turning the reversal into a simple straight run.



tom

--
That's no moon!