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Author Topic: Cornwall signalling upgrade - ongoing discussion, merged topics  (Read 12818 times)
Electric train
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« Reply #15 on: October 10, 2016, 07:50:16 pm »

Its probably best to wait now anyway until ERTMS and ETCS come along and slash the costs of renewals (well in theory, anyway Tongue ).  Oh hang on a minute, we won't be part of the EC soon........ Shocked

I doubt the UK leaving the EU will mean NR walking away from ERTMS / ETCS principles or indeed TSI's
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« Reply #16 on: October 10, 2016, 11:02:53 pm »

Its probably best to wait now anyway until ERTMS and ETCS come along and slash the costs of renewals (well in theory, anyway Tongue ).  Oh hang on a minute, we won't be part of the EC soon........ Shocked

I doubt the UK leaving the EU will mean NR walking away from ERTMS / ETCS principles or indeed TSI's

Indeed, they are just effectively industry standards which make it far cheaper to procure kit, and greatly increases the odds that it will all work nicely. Witness the GWML electrification - knitting and trains to TSI's, seemed like almost as soon as installation was complete the IET's were running along at the best part of 140mph with little or no tweaking to either, 387's equally seem to have come in with minimal fuss. 
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« Reply #17 on: October 11, 2016, 08:38:50 am »

My tounge in cheek comment was referring to the costs. Personally, I think the EU exit will result in the technology becoming unaffordable even if it is an industry standard, so it will only be applied to certain primary lines and other lines will use 'cheaper' conventional (modular) lineside signalling.
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Tim
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« Reply #18 on: October 11, 2016, 01:31:50 pm »

Its probably best to wait now anyway until ERTMS and ETCS come along and slash the costs of renewals (well in theory, anyway Tongue ).  Oh hang on a minute, we won't be part of the EC soon........ Shocked

I doubt the UK leaving the EU will mean NR walking away from ERTMS / ETCS principles or indeed TSI's

ETCS has been installed in China, India, Turkey, Israel, Libya, Belarus, New Zealand,  Kazakhstan, Korea, Mexico, Saudi Arabia, Switzerland and Australia.

The only difference to the UK in leaving the EU is that installing ETCS will be completely our decision rather than currently where it is compulsory in some circumstances. 

I think this is a positive change because it gives NR the freedom to install it only where benefits outweigh the costs.  The justification for ETCS for its own sake was always weaker for GB as we only have one connection to the rest of Europe's railway and gauging issues limit the usefulness of that.   
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« Reply #19 on: October 11, 2016, 06:32:34 pm »

Personally speaking, seeing the everyday failures further East using a more modern system, I'd rather keep what we have down here
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« Reply #20 on: October 15, 2016, 03:27:40 am »

Chacewater, Redruth
Considering there is already an IBS on the down main at Baldhu, will the section become TCB or is there going to be an arrangement similar to that over Druimuachdar where there is more than one IBS between the boxes?
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bignosemac
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« Reply #21 on: October 15, 2016, 10:15:40 am »

I know TCB - Track Circuit Block - but what is IBS?
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« Reply #22 on: October 15, 2016, 10:36:05 am »

I know TCB - Track Circuit Block - but what is IBS?

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SandTEngineer
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« Reply #23 on: October 15, 2016, 10:37:55 am »

I know TCB - Track Circuit Block - but what is IBS?
Intermediate Block Signal (a signal section - normally a distant and stop signal pair - that breaks up a long section, usually between two mechanical signalboxes). However, as always, there are exceptions to this found all over the network.
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Chris from Nailsea
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« Reply #24 on: October 15, 2016, 10:58:43 am »

With thanks for those details, I've now added IBS to the Coffee Shop forum acronyms/abbreviations page.  Smiley
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SandTEngineer
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« Reply #25 on: October 15, 2016, 12:15:02 pm »

Chacewater, Redruth
Considering there is already an IBS on the down main at Baldhu, will the section become TCB or is there going to be an arrangement similar to that over Druimuachdar where there is more than one IBS between the boxes?
Truro to Roskear is being converted to TCB using axle counters.  The intermediate signals (excluding T45 at Baldhu - control retained by Truro) will be controlled by Roskear.
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« Reply #26 on: October 15, 2016, 12:42:28 pm »

Thanks.  I wonder what will be going on the lever lead for T45.  I seem to remember a discussion elsewhere about the situation where a previous IBS has been retained as a controlled signal from the lever frame when the line was converted to TCB and the only obvous example was Great Missenden where the signal was simply referred to as "Intermediate".  That said, is there any reason why T45 (and indeed the new signals) can't just be automatics?
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SandTEngineer
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« Reply #27 on: October 15, 2016, 02:33:56 pm »

Thanks.  I wonder what will be going on the lever lead for T45.  I seem to remember a discussion elsewhere about the situation where a previous IBS has been retained as a controlled signal from the lever frame when the line was converted to TCB and the only obvous example was Great Missenden where the signal was simply referred to as "Intermediate".  That said, is there any reason why T45 (and indeed the new signals) can't just be automatics?
Some of the intermediate signals will have an 'Automatic Working' mode and will be slotted by the adjacent signalbox due to axle counter boundaries.  I would suggest that the reason the new signals are not pure automatics is due to the number of level crossings that are involved and that need to be protected.  Anyway, trying not to make this thread too technical for the general reader.
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SandTEngineer
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« Reply #28 on: June 12, 2017, 09:34:31 am »

I have heard today that AMEY has ben awarded the contract for Phase 1 of the resignalling.
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« Reply #29 on: June 12, 2017, 12:15:31 pm »

Reports elsewhere suggest that this contract - if Phase 1 is for Truro to St Erth resignalling - has gone to Atkins, not Amey.

http://www.railstaff.uk/2017/06/12/atkins-awarded-9m-contract-upgrade-signalling-cornwall/
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