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. They won't have changed too much to the present day.
The two lines that are presently available are the Northern Line and the Victoria Line.
This page shows the key to the symbols used in Roger's diagrams.
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Last updated 25th November 2009 © Copyright Tubeprune 2001 - 2009.
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