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SPAD
Sept 27, 2013 12:56:11 GMT
Post by liverpoollou on Sept 27, 2013 12:56:11 GMT
Can someone explain the SPAD categories A B C and what constitutes an aggravated SPAD.
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SPAD
Sept 27, 2013 18:26:11 GMT
Post by railtechnician on Sept 27, 2013 18:26:11 GMT
Can someone explain the SPAD categories A B C and what constitutes an aggravated SPAD. Not a signals & track question! AFAIK SPAD categories are purely Operational, on signals we made no distinction, a SPAD was a SPAD. There isn't an Operational section as such in this forum, perhaps there ought to be as the proper place for such questions to be answered!
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Deleted
Deleted Member
Posts: 0
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Post by Deleted on Sept 27, 2013 20:23:23 GMT
Can someone explain the SPAD categories A B C and what constitutes an aggravated SPAD. Not a signals & track question! AFAIK SPAD categories are purely Operational, on signals we made no distinction, a SPAD was a SPAD. There isn't an Operational section as such in this forum, perhaps there ought to be as the proper place for such questions to be answered! Plainly it is a Signalling and Track question, and plainly Signalling and Track can be discussed in an operational context. Not everyone here shares your background, is interested in it or comes here to discuss topics related to it. The fact that you are under the impression that the purpose of this section is not to facilitate discussion of operational matters concerning Signalling and Track is ill conceived in the absence of any words to that effect from the forum staff. Until they say otherwise then I see no reason why both technical and operational matters pertaining to Signalling and Track should not be discussed here. Indeed your thread 'Walking Pace' posted in this section is about an operational matter. In answer to the OP, SPADs are no longer categorised in that way, and although I can't recall the exact definitions of them, they were something like: A - the signal was passed at danger even though it was displaying the red aspect correctly and the driver received sufficient warning. B - the signal was returned to danger in error by the signaller or signalling system and there was insufficient time for the train to stop C - the signal was returned to danger in an emergency by the signaller or signalling system and there was insufficient time for the train to stop. Happy to stand corrected if I've misquoted any of these. A SPAD becomes aggravated if the driver doesn't follow the correct procedure after it has occurred, regardless of he SPAD category.
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SPAD
Sept 28, 2013 23:14:09 GMT
Post by railtechnician on Sept 28, 2013 23:14:09 GMT
Not a signals & track question! AFAIK SPAD categories are purely Operational, on signals we made no distinction, a SPAD was a SPAD. There isn't an Operational section as such in this forum, perhaps there ought to be as the proper place for such questions to be answered! Until they say otherwise then I see no reason why both technical and operational matters pertaining to Signalling and Track should not be discussed here. Indeed your thread 'Walking Pace' posted in this section is about an operational matter. In answer to the OP, SPADs are no longer categorised in that way, and although I can't recall the exact definitions of them, they were something like: A - the signal was passed at danger even though it was displaying the red aspect correctly and the driver received sufficient warning. B - the signal was returned to danger in error by the signaller or signalling system and there was insufficient time for the train to stop C - the signal was returned to danger in an emergency by the signaller or signalling system and there was insufficient time for the train to stop. Happy to stand corrected if I've misquoted any of these. A SPAD becomes aggravated if the driver doesn't follow the correct procedure after it has occurred, regardless of he SPAD category. @af, I agree! You have me as I have been hoist by my own petard and there's no getting away from it.
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SPAD
Sept 29, 2013 10:25:47 GMT
Post by liverpoollou on Sept 29, 2013 10:25:47 GMT
Thank you for the replies.
I put the post here as I thought it was most appropriate, maybe Admin could look at adding a Board under 'operational matters' that would at least provide one for teccy and another for operational.
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Post by Seven Kings Kid on Sept 30, 2013 21:18:20 GMT
Just to add a bit more on SPAD categories: The SPAD categories were redrawn/recast in March 2013. The categories now are: A1 - train fails to stop at a correctly displayed signal. A2 - train SPADs an incorrectly displayed Stop Signal (ie No red aspect), but the stop signal was preceded by a correctly working repeater. A3 - SPAD occurs where permission to pass a signal at danger was given by an authorised person to the driver, but the authorising person failed to get the signallers authority. A4 - Signals displayed correctly but driver unable to stop by circumstances beyond their control (ie poor rail adhesion or brake failure) Categories B, C & D still exist - cat D is a SPAD by an undriven vehicle (ie a runaway!!)
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