London Banter - View Single Post

Christopher A.Lee · June 18th 07, 02:52 PM posted to uk.transport.london,uk.railway

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?

There was an accident in the USA a few years ago. Because of the
inertia of the heavy freight trains the distant is a long way before
the stop signal. But in this case there was a platform stop between
them. A commuter train stopped there and sped off because the engineer
forgot that the distant was at yellow, running through the stop signal
protecting a junction with the main line and colliding head on with an
Amtrak train.