On 18 Jun, 15:52, Christopher A.Lee wrote:
On Mon, 18 Jun 2007 05:38:25 -0700, wrote:
On 15 Jun, 07:33, "Clive D. W. Feather" c...@on-the-
train.demon.co.uk wrote:
In article .com,
writes

Um, no signal *does* mean green. Unlit signal - not the same thing -
means red.
Does it?
No signal when there should be one, as you pointed out = unlit signal
= red.

I'll have to think about this. There is no "where there should be one"
in railway signalling, but if a driver's route knowledge leads him to
think that there should be a signal at some landmark (in this case, the
headwall) then he should treat its absence as a danger.

There is on the underground. LU's signalling standards state that
every platform shall be provided with a platform starting signal. The
only locations that I'm aware of which are not compliant are Chesham,
Croxley SB and Kensington Olympia.

Aren't both these operated as though they were long sidings?

Effectively, yes.

There is a home signal at Chesham, but it's associated with the speed
control more than anything else.
Likewise, there are only a handful (IIRC 2 or 3) of track circuits
tere, the main part of the branch back to Chalfont being catered for
by axle counters.