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| 'R' button on Redditch line 20/12/2011 at 00:01 #25835 | |
urbanfox
8 posts |
Hi all, On the Redditch line there is an 'R' button which seems to hold the repeater for signal 5 at yellow, even if the main signal is clear. Was just wondering what the purpose of this button is and what circumstances it would be used under? Thanks Log in to reply |
| Re: 'R' button on Redditch line 20/12/2011 at 00:15 #25837 | |
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UKTrainMan
1803 posts |
Had always had me wondering, but have never been able to work it out nor find out. I first thought that it may have something to do with the Lickey Incline - that's the line from Bromsgrove (and Stoke Works Jn and Gloucester, etc) - but surely it cannot. The only other thing I can assume it has something to do with is the very tight curve at Barnt Green with it's 15mph limit and water jets in the four foot, but I'm simply guessing.
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. Log in to reply |
| Re: 'R' button on Redditch line 20/12/2011 at 08:19 #25856 | |
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daza7789
59 posts |
I believe this is provided for when the One Train Working section fails and the line is being pilot worked. Though I am not 100% sure and cannot find any reference in rule book TS8. On absolute block lines (The redditch line is OTW not absoute block, but still..) then if the block fails the distant signal in the section must be maintained in the caution position. This is the only reason behind the replacement button that I can see. I may be wrong though Daz Log in to reply |
| Re: 'R' button on Redditch line 20/12/2011 at 09:19 #25863 | |
headshot119
4869 posts |
It is definitely to do with Pilotman working. I'm sure it was mentioned at the London Meet. The only reference I can find in the rule book so far is Module P - Diagram P1.2 "Passengers for New Lane, should be seated in the rear coach of the train " - Opinions are my own and not those of my employer Log in to reply |
| Re: 'R' button on Redditch line 20/12/2011 at 09:35 #25869 | |
GeoffM
6376 posts |
Former signaller/trainer bloke sitting opposite me was posed this question - from the area but doesn't know this particular situation. Anyway, his first answer matched Daza's AB answer. The other possibility was in fog where the train had to be cautioned at each signal. Bear in mind that Saltley dates from 40+ years ago and regulations now aren't the same as back then.
SimSig Boss Log in to reply |
| Re: 'R' button on Redditch line 20/12/2011 at 15:14 #25890 | |
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Stephen Fulcher
2084 posts |
The strange thing is that to keep a repeater at caution is easy without a replacement function - you simply keep the signal that the repeater applies to at danger until the train has passed the repeater.
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| Re: 'R' button on Redditch line 20/12/2011 at 16:40 #25893 | |
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Late Turn
699 posts |
In an AB section though (where this facility is probably most commonly provided, as noted above - in the relatively few cases where there isn't independent control of the distant), you often won't know that the train has passed the distant until he's occupied the berth track and thus almost at a stand at the home signal.
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| Re: 'R' button on Redditch line 22/12/2011 at 22:49 #26082 | |
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Adrian the Rock
111 posts |
A mechanical signalbox did survive at Redditch into the early 1970s. This may have had something to do with it. Don't know how the section was worked then. I think there may still have been some freight workings to there at that time. (The passenger service then was just one morning and one evening peak return service from New St!!) I'll make some enquiries elsewhere. Log in to reply |
| Re: 'R' button on Redditch line 23/12/2011 at 00:19 #26085 | |
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TomOF
452 posts |
I believe it survived until around 1992/3 when the cross city was modernised and resignalled in places.
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