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Greenford clip

You are here: Home > Forum > Miscellaneous > The real thing (signalling) > Greenford clip

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Greenford clip 11/03/2010 at 22:57 #7233
GeoffM
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6376 posts
Nice video, well shot and narrated. That is an impressive zoom you have there, and steady as an (Adrian) Rock!
SimSig Boss
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Greenford clip 13/03/2010 at 15:37 #7267
Right Away
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71 posts
Lovely. Thank you. Very informative. Hope there will be more.
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Greenford clip 15/03/2010 at 09:21 #7298
UKTrainMan
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1803 posts
Fantastic stuff. Loved the zoom so much I went about as green [with envy] as the stem on a daffodil!

Don't blame for you being surprised at the signaller giving priority to that other up Chiltern train, I was also surprised.

Watching that video also surprisingly helped me learn something new as I was wondering about the white aspect in-between the two main aspects for the Central Line.

Thanks for sharing.

Any views and / or opinions expressed by myself are from me personally and do not represent those of any company I either work for or am a consultant for.
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Greenford clip 15/03/2010 at 10:38 #7303
clive
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2789 posts
The white aspect is explained here: http://www.davros.org/rail/signalling/articles/central.html

What it means, roughly, is that trains may proceed if they're under either ATO or ATP ("Coded Manual"control. It is safe to pass this signal, but the train will need to stop *before* the next signal, not at it. (More precisely, it needs to stop at a block marker point, which is a "signal" for ATP purposes but doesn't have a physical display.)

You also see white aspects on the Victoria Line, though they're lunar white.

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Greenford clip 15/03/2010 at 11:55 #7306
Right Away
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71 posts
Thanks for the link Clive. How depressing to find all speeds in km/h. As someone approaching more senior years I much prefer imperial mph!
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