Index and Key to Signal Diagrams
By Roger Mather
Roger Mather has produced some excellent signalling
schematics of various line sections of the Underground as a reference source for visitors
to the Tubeprune website. They are believed to be correct as at 10 December 2002.
Click on the name of the diagrams for the two lines that are
presently available, the Northern Line and
the Victoria Line.
This page shows the key to the symbols used in Roger's
diagrams.
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