In article , Tom
Anderson writes
I asked a knowledgeable friend.

Firstly, it wasn't on the Subway but on the erstwhile Brooklyn Bridge
Railway, at the Manhattan end. Turning it into UK terms, the layout
would be:

Or, rather, wouldn't be. Further checks showed he'd misunderstood
things, and it was actually:

/----------\
|-------* ######## ==========================
\ /--------/
X
/ \--------\
|-------* ######## ==========================
\----------/

where the equals signs show interlaced ("gantletted") tracks over the
bridge. The necks were used for loco shunting, not the trains
themselves.

The idea was that the passengers travelled over *zero* sets of points.

Do trains drive on the left in the US, then?

No, I deliberately put it in UK layout.

I'm guessing a diamond crossing is just where two pairs of rails cross;

Correct.

Is that right? If so, what's a slip?

A connection from top-left to top-right (or bottom-left to bottom-right)
of a diamond, with one rail of the connection going within the diamond.
A double-slip involves both.

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Clive D.W. Feather | Home:
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