London Banter - View Single Post - Approach-control signal, Moorgate Met

Neil Williams · January 11th 09, 10:25 PM posted to uk.transport.london

On Sun, 11 Jan 2009 13:29:14 -0800 (PST),
wrote:

It's a Draw Up Signal. They are basically speed controlled stop
signals to protect a set of points in advance of the next, in this
case, station starting signalm if the starter's overlap is not
sufficient to protect a collision at the fouling point. If the signal
in advance was at danger then the Draw Up signal (identified by adding
a 0 or 00 to the number on the starter) whould show a red aspect,
until the timing section knew that the train was slow enough. It would
then show a yellow (or in some cases a green aspect).

Thanks. Is the main (starter) signal also approach-controlled, then,
as I don't recall ever *not* having been slowed half way up the
platform.

Neil

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Neil Williams
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