Crossing Failures

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Crossing Failures 15/02/2010 at 18:30 #721
Javelin395
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270 posts 		A quick query for those more experienced than myself..............tried searching for crossing failure but didn't find anything so here goes:

Running the Cambridge 2005 SX timetable when I experienced an (AHB?) level crossing failure. I had already signalled train 0E26 towards Manea from signal 303 and the signals across Ely North Junction and Queen Adelaide (Peterborough) crossing had cleared. At this point the crossing failure button for Queen Adelaide (Peterborough) activated.

My question is what is the correct action to take in these circumstances? Should I replace signal 303 to danger and then take the hit for replacing a signal to danger with train approaching? I'm guessing this is the sensible thing to do as I dont know whether the crossing has failed in the raised or lowered position.
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Crossing Failures 15/02/2010 at 18:30 #6733
Javelin395
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270 posts 		A quick query for those more experienced than myself..............tried searching for crossing failure but didn't find anything so here goes:

Running the Cambridge 2005 SX timetable when I experienced an (AHB?) level crossing failure. I had already signalled train 0E26 towards Manea from signal 303 and the signals across Ely North Junction and Queen Adelaide (Peterborough) crossing had cleared. At this point the crossing failure button for Queen Adelaide (Peterborough) activated.

My question is what is the correct action to take in these circumstances? Should I replace signal 303 to danger and then take the hit for replacing a signal to danger with train approaching? I'm guessing this is the sensible thing to do as I dont know whether the crossing has failed in the raised or lowered position.
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Crossing Failures 16/02/2010 at 11:09 #6751
kbarber
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1712 posts 		Personally that's exactly what I'd do... exactly what I'd have done IRL too (but that's a long time ago now). Even if the driver's virtually on the red when it's dropped on him, he gets at least a few extra yards' braking before reaching the failed crossing. (Seems a bit harsh to have a change of aspect penalty in those circumstances though.)
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Crossing Failures 16/02/2010 at 19:38 #6757
afro09
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167 posts 		Javelin395,

AHB stands for, "Automatic Half Barriers". For information on each style of LC check out the following Wiki link, http://www.SimSig.co.uk/index.php?option=com_jfusion&Itemid=73.

When I search for failures it only gives the regular TCF, Points and Signal failures. But there is no LC failure which I do know occurs as I had the same LC fail on me a few times. The failures page on the Wiki is http://www.SimSig.co.uk/index.php?option=com_jfusion&Itemid=73

And a search under Abreviations which should show 'FAI' does not either, Wiki search for Abreviations is http://www.SimSig.co.uk/index.php?option=com_jfusion&Itemid=73.

Maybe some one can see something I am missing in these pages.

Alan.
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Crossing Failures 16/02/2010 at 21:03 #6761
Peter Bennet
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5363 posts 		I think, unless things have changed recently, that AHB failure is not a real failure.

From the developer manual:

"Lines are normally fitted with "roll-back protection" - if a train remains on the strike-out section for more than 2 minutes, the crossing will close again and failure will be indicated to the signaller."

Peter
I identify as half man half biscuit - crumbs!
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Crossing Failures 17/02/2010 at 00:09 #6767
AndyG
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1835 posts 		I was under the impression that on an AHB LC, the failure indicator (not a button) lit after the barriers were down for an unusual length of time, eg with a TCF inhibiting normal operation. When this occurs due to a slow train, it clears once the barriers rise.

I stand to be corrected though.
I can only help one person a day. Today's not your day. Tomorrow doesn't look too good either.
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Crossing Failures 17/02/2010 at 06:57 #6768
Peter Bennet
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5363 posts 		Yes that accords with my understanding.

Peter
I identify as half man half biscuit - crumbs!
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Crossing Failures 17/02/2010 at 13:15 #6775
clive
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2738 posts 		Just to make things clear: SimSig does not, currently, simulate real failures of AHB equipment (lights not working, barriers jamming in the wrong position, that sort of thing).

The logic in a real AHB has various checks in it to prevent the road barriers being kept down for a long period with no train coming; for example, if a train comes to a stop on the approach to a crossing and just sits there for several minutes. All of these are reported to the signaller as "failed", and SimSig *does* simulate these. When the problem clears, so does the failure alarm.
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Crossing Failures 17/02/2010 at 13:18 #6776
clive
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2738 posts 		kbarber said:
(Seems a bit harsh to have a change of aspect penalty in those circumstances though.)
Maybe. Similarly, it's harsh to get the "passenger train on goods line" penalty when there's no alternative. But it's impractical to do otherwise.
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Crossing Failures 17/02/2010 at 14:12 #6778
alan_s
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152 posts 		Its even harsher to get the "change of aspect penalty" from a delayed train when the driver has specifically phoned to say you can reset the signal!!
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Crossing Failures 17/02/2010 at 14:41 #6779
GeoffM
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6288 posts 		alan_s said:
Its even harsher to get the "change of aspect penalty" from a delayed train when the driver has specifically phoned to say you can reset the signal!!
Where did this happen? Did you not replace the signal within a reasonable time frame?
SimSig Boss
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Crossing Failures 18/02/2010 at 09:16 #6791
wain77
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81 posts 		I've been playing Waterloo over the last couple of days and whenever a train reports a delay and I cancel the signal (immediately), it acts as though I had just dropped the route for the fun of it...

Is the Sim supposed to take account of delayed trains?

Sam
Sam Wainwright
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Crossing Failures 18/02/2010 at 20:12 #6809
alan_s
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152 posts 		GeoffM said:
alan_s said:
Its even harsher to get the "change of aspect penalty" from a delayed train when the driver has specifically phoned to say you can reset the signal!!
Where did this happen? Did you not replace the signal within a reasonable time frame?
Sorry Geoff, it was a while ago, I really can't remember. But yes as far as I know, I answered the phone quickly, responded "OK I'll reset the signal" or similar, and then immediately reset the signal; and got the penalty.

I can't even tell you which sim this was in I'm afraid; since that time I tend not to bother to reset the signal. Next time I will do so and give you the info.

Alan
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Crossing Failures 26/02/2010 at 21:34 #6977
KurtDS
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49 posts 		I've heard of a lorry losing control, running through and destroying AHB equipment, and the crossing still did not report itself a failure.
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