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| Signal 104 "no overlap available" 25/04/2021 at 13:56 #139031 | |
Albert
1315 posts |
In the attached save, I attempted to set the route out for 6U03 in platform 1 towards Fairwood Jn but got 'no overlap available'. This is a rather odd message in this case as there is no need to set any points in the overlap of signal 104 (the red signal which 7V16 just passed). I can set the route if I wait until the overlap is clear. It just surprised me that it wouldn't set any earlier. FWIW, 7V16 came out of Down Yard 7-12. Post has attachments. Log in to view them. AJP in games Log in to reply |
| Signal 104 "no overlap available" 25/04/2021 at 19:50 #139059 | |
Peter Bennet
5400 posts |
Interesting, the O/L is coded as both a shunt and a main overlap and it appears till one is cleared the other can't be used even though they are identical in all other respects. Peter I identify as half man half biscuit - crumbs! Log in to reply |
| Signal 104 "no overlap available" 25/04/2021 at 23:06 #139068 | |
GeoffM
6370 posts 
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Peter Bennet in post 139059 said:Interesting, the O/L is coded as both a shunt and a main overlap and it appears till one is cleared the other can't be used even though they are identical in all other respects.There is a Mantis ticket somewhere for oversetting a shunt onto a main or vice versa. It seems to be quite rare in the UK but quite common in Australia. SimSig Boss Log in to reply |
| Signal 104 "no overlap available" 26/04/2021 at 06:08 #139073 | |
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Peter Bennet
5400 posts |
Thanks, I'll need to remind myself where the shunt overlap came from. Peter I identify as half man half biscuit - crumbs! Log in to reply |
| Signal 104 "no overlap available" 26/04/2021 at 06:49 #139074 | |
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Peter Bennet
5400 posts |
I've not got the control tables for Westbury but seems it has been the case (with the Sim) since at least May 2011. Peter I identify as half man half biscuit - crumbs! Last edited: 26/04/2021 at 09:20 by Peter Bennet Reason: None given Log in to reply |
| Signal 104 "no overlap available" 26/04/2021 at 11:59 #139082 | |
flabberdacks
634 posts |
GeoffM in post 139068 said:Peter Bennet in post 139059 said:31615Interesting, the O/L is coded as both a shunt and a main overlap and it appears till one is cleared the other can't be used even though they are identical in all other respects.There is a Mantis ticket somewhere for oversetting a shunt onto a main or vice versa. It seems to be quite rare in the UK but quite common in Australia. 
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| Signal 104 "no overlap available" 13/07/2021 at 12:41 #140548 | |
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Dionysusnu
577 posts
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This also happens with the call-on route at Saltley S194 to S200, because the call-on route includes an overlap, for some reason.
Last edited: 13/07/2021 at 15:46 by Dionysusnu Reason: None given Log in to reply |
| Signal 104 "no overlap available" 13/07/2021 at 15:27 #140549 | |
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Albert
1315 posts |
I can't find 194 nor 200 on the signal number plan of Saltley, would you mind indicating whereabouts these signals are?
AJP in games Log in to reply |
| Signal 104 "no overlap available" 13/07/2021 at 15:46 #140550 | |
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Dionysusnu
577 posts
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B'ham Moor Street into Snow Hill, platform 2
Last edited: 13/07/2021 at 16:31 by Dionysusnu Reason: None given Log in to reply |
| Signal 104 "no overlap available" 13/07/2021 at 17:02 #140551 | |
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Albert
1315 posts |
You mean that the call-on route cannot be set if the overlap of a previous train into the platform is not clear yet?
AJP in games Log in to reply |
| Signal 104 "no overlap available" 13/07/2021 at 17:07 #140552 | |
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Dionysusnu
577 posts
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Precisely. That overlap is quite slow to time out.
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| Signal 104 "no overlap available" 13/07/2021 at 18:06 #140555 | |
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GeoffM
6370 posts
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Albert in post 140551 said:You mean that the call-on route cannot be set if the overlap of a previous train into the platform is not clear yet?Dionysusnu in post 140552 said: Precisely. That overlap is quite slow to time out.Long platform, 15mph, around 60s timeout*. Seems about right to me without seeing the control tables - though I wouldn't be surprised if it's actually too short and should be more like 120s like a lot of others like this. * Rule of thumb is to take the TC length in metres, divide by the max speed in m/s, and add half on again to get the overlap release time in seconds. However, there are shorter times, and there are longer times. Just depends on a number of variables. SimSig Boss Log in to reply The following user said thank you: Dionysusnu |
| Signal 104 "no overlap available" 17/08/2021 at 20:10 #141186 | |
Guts
604 posts |
I don't know if I should start a new thread for this. Is there any reason S277 from the East Somerset line has an overlap? Is it a passenger line? Log in to reply |
| Signal 104 "no overlap available" 17/08/2021 at 20:42 #141188 | |
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GeoffM
6370 posts
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Guts in post 141186 said:I don't know if I should start a new thread for this.I don't know why nearly the whole has overlaps - perhaps aspirations for passenger service? - but this photo shows them (see the little arrows).  Post has attachments. Log in to view them. SimSig Boss Log in to reply |
| Signal 104 "no overlap available" 18/08/2021 at 07:41 #141196 | |
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clive
2781 posts |
Particularly in the case of DS2/US2, I wonder if it's extra protection for the single-line working.
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| Signal 104 "no overlap available" 18/08/2021 at 12:42 #141200 | |
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Dionysusnu
577 posts
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On a slightly related note, why is S275 approach controlled for all routes? They both seem to be straight, or at least no speed reduction.
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| Signal 104 "no overlap available" 18/08/2021 at 13:09 #141201 | |
Hap
1030 posts
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Dionysusnu in post 141200 said:On a slightly related note, why is S275 approach controlled for all routes? They both seem to be straight, or at least no speed reduction.There is a speed reduction from 30 to 20 on to the U/DGL and 25 for the main route off of the branch, protecting a 100mph mainline. How to report an issue: www.SimSig.co.uk/Wiki/Show?page=usertrack:reportanissue Log in to reply |
| Signal 104 "no overlap available" 18/08/2021 at 16:26 #141204 | |
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Stephen Fulcher
2076 posts |
Also saves a timeout if the Signaller changes his mind and the train hasn’t got there yet
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