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Colin Rosenstiel · May 26th 05, 09:20 PM posted to uk.transport.london

In article , (Mark Brader)
wrote:

Clive Feather:
Once Fotopic stops acting strangely,
http://davros.fotopic.net/p14923871.html
should allow you to see a double-slip (one with a switch diamond).

Which is to say, an even more expensive construction than the usual
double slip. Note the points where the straight rails cross. That --
which can also be done for an ordinary diamond -- is something usually
done only where the angle between the two tracks is unusually shallow,
as at a high-speed junction or where the tracks are also sharply
curving.

This location is just outside King's Cross, and I don't know why it was
done there.

Switch diamonds wear less than conventional diamonds, I would expect. I
can think of few more punishing locations for trackwork than the King's
Cross throat.

--
Colin Rosenstiel