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Author Topic: Swindon to Kemble re-doubling - ongoing discussion and updates  (Read 290534 times)
SandTEngineer
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« Reply #195 on: August 20, 2013, 20:20:12 »

The two new crossovers (Nos. 8655AB and 8656AB) will be installed between the 78 1/4 and 78 1/2 mileposts (just North of the existing double to single line turnout No. 368 that will be recovered).

The existing Signal No. S149 on the cantilever structure at Kemble station will be recovered and replaced by a new straight post Signal No. SW1334.

The new crossover between Kemble Tunnel and Station (No. 8658AB) will, as previously advised, allow Down trains to terminate in Kemble station Up platform (a new stop Signal No. SW1335 being provided North of the Up platform to limit the movement) and will also allow Up trains to crossover from Kemble Up platform from Signal No. SW1334 to a new Limit Of Shunt Signal No. SW6546 on the Down line South of Kemble Tunnel and then reversing into Kemble station Down platform from new Down line Signal No. SW1333 located at the South end of Kemble Tunnel.

The existing turnout and trap point leading from the Up line at Kemble station to the old Tetbury Cirencester branch platform siding will be retained and continue to be operated by the existing Kemble Ground Frame (Release No.8659).

The new signalling will be controlled from the existing Thames Valley Signalling Centre located at Didcot.

Edit: to change name of branch line at Kemble (I should have known better) Roll Eyes
« Last Edit: August 21, 2013, 20:41:09 by SandTEngineer » Logged
Chris from Nailsea
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« Reply #196 on: August 20, 2013, 20:57:40 »

SN291 will be retained, then??   Wink

See http://www.firstgreatwestern.info/coffeeshop/index.php?topic=6189.msg60853#msg60853   Grin
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SandTEngineer
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« Reply #197 on: August 20, 2013, 21:16:29 »


Yes, but it will be renumbered SW6548 Wink

CfN: Once its renumbered you will be able to enter it in a quiz again CheesyTongue
« Last Edit: August 20, 2013, 21:35:22 by SandTEngineer » Logged
TonyK
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« Reply #198 on: August 20, 2013, 21:22:04 »



STE, that sounds a very blas^ description of a mere change of name, but your earlier post hints at what a major change this really is.
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Now, please!
SandTEngineer
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« Reply #199 on: August 20, 2013, 21:29:49 »

 Grin

I should have also added to my earlier post that the two existing crossovers on the Gloucester Line at the West end of Swindon station (Nos. 360AB and 361AB) will be recovered and both running lines from the new crossovers to Swindon station will become fully reversible.

If I get some spare time over the BH weekend I will draw all of this out in a sketch.
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Railfriend
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« Reply #200 on: August 20, 2013, 21:45:02 »


Anyone know if any changes are being made to the track at Swindon station, such as to the track leading to Platform 2?  What about a crossover added from Platform 4 to the Kemble line?
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« Reply #201 on: August 20, 2013, 21:53:44 »


'Four Track, Now': does your name have any reference to the double track between Didcot and Swindon being increased to four tracks?  I've seen reference to this possibility at times, but don't know if there are any plans.
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SandTEngineer
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« Reply #202 on: August 20, 2013, 21:57:53 »


Anyone know if any changes are being made to the track at Swindon station, such as to the track leading to Platform 2?  What about a crossover added from Platform 4 to the Kemble line?

As I stated in the post above yours the changes at Swindon station only involve the recovery of the two crossovers.  No other changes are planned, even when the station area is resignalled next year (2014 that is).
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bobm
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« Reply #203 on: August 20, 2013, 23:12:17 »

With the signalling moving to Didcot, which I must admit I hadn't realised was happening - but makes sense - what is the thinking behind the SW prefix? 
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Red Squirrel
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« Reply #204 on: August 21, 2013, 10:05:07 »


'Four Track, Now': does your name have any reference to the double track between Didcot and Swindon being increased to four tracks?  I've seen reference to this possibility at times, but don't know if there are any plans.

No - he's a collector of vintage recording equipment!  Smiley
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IndustryInsider
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« Reply #205 on: August 21, 2013, 10:51:26 »

Some signalling changes due to come into effect after the blockade have been deferred apparently.
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Sapperton Tunnel
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« Reply #206 on: August 21, 2013, 11:59:06 »

The two new crossovers (Nos. 8655AB and 8656AB) will be installed between the 78 1/4 and 78 1/2 mileposts (just North of the existing double to single line turnout No. 368 that will be recovered).

This is what had been installed on Sunday 18th, then, when I went up the back of B & Q / Rodbourne Road.


The existing Signal No. S149 on the cantilever structure at Kemble station will be recovered and replaced by a new straight post Signal No. SW1334.

The new crossover between Kemble Tunnel and Station (No. 8658AB) will, as previously advised, allow Down trains to terminate in Kemble station Up platform (a new stop Signal No. SW1335 being provided North of the Up platform to limit the movement) and will also allow Up trains to crossover from Kemble Up platform from Signal No. SW1334 to a new Limit Of Shunt Signal No. SW6546 on the Down line South of Kemble Tunnel and then reversing into Kemble station Down platform from new Down line Signal No. SW1333 located at the South end of Kemble Tunnel.


As mentioned by FTN, this represents a considerable investment by Network Rail, for what is just really a contingency to be able to reverse trains at Kemble from Swindon in times of disruption with a signalled move to the Up platform. Wow. I guess they really do need a crossover somewhere between Swindon and Standish Junction and presume that this will be the only one as there is currently no other between Kemble and Standish.

The existing turnout and trap point leading from the Up line at Kemble station to the old Tetbury branch platform siding will be retained and continue to be operated by the existing Kemble Ground Frame (Release No.8659).


I really appreciate all the info, STE, that you so kindly supply, but just a tiny correction if I may; the siding is the old Cirencester branch trailing into the Up line.


I should have also added to my earlier post that the two existing crossovers on the Gloucester Line at the West end of Swindon station (Nos. 360AB and 361AB) will be recovered and both running lines from the new crossovers to Swindon station will become fully reversible.


Good, they have been one of the weak spots and given trouble over the years as the crossovers are on the curve as the line leaves Swindon Station. Many years ago I was on a Gloucester RC & W Cross Country set going into Swindon and we stopped dead on one of these crossovers as the driver thought we had derailed on the turnout due to the noise and banging going on (not from the passengers by the way).


Anyone know if any changes are being made to the track at Swindon station, such as to the track leading to Platform 2?  What about a crossover added from Platform 4 to the Kemble line?


There isn't sufficient room between the end of Platform 4 and the Gloucester line Junction.  Years ago there used to be a crossover from the reversible Up Through line to the Platform 3 line, just beyond the west (Down) end of the platform, so that trains to or from the Gloucester line didn't have to use either the Platform 3 or Platform 1 lines as they have to now. The last time I saw it in use was for a Cheltenham Race special on the Up Through waiting to turn right after the departure of a service train from the Bay platform 2. Must have been the mid '80s.

ST
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SandTEngineer
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« Reply #207 on: August 21, 2013, 17:54:38 »

With the signalling moving to Didcot, which I must admit I hadn't realised was happening - but makes sense - what is the thinking behind the SW prefix? 

SW=SWindon

Usually it would be SN (first and last letters) but that one is already used for Slough New.
« Last Edit: August 21, 2013, 20:42:58 by SandTEngineer » Logged
TonyK
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« Reply #208 on: August 21, 2013, 19:46:40 »


'Four Track, Now': does your name have any reference to the double track between Didcot and Swindon being increased to four tracks?  I've seen reference to this possibility at times, but don't know if there are any plans.
No, it is connected to the campaign for the re-qaudrupling of the linw from Bristol Temple Meads to Filton Bank, and was what was before me on the day I signed up and had to thinl of a name quickly. Had it been the following evening, it could have been "Dog taking a dump" or something. It has served me reasonably well. Further analysis can be found here.


No - he's a collector of vintage recording equipment!  Smiley

I'm the only man I know with a record player. You are not the first to hold that opinion.
« Last Edit: August 21, 2013, 19:55:46 by Four Track, Now! » Logged

Now, please!
bobm
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« Reply #209 on: August 21, 2013, 19:55:32 »

Had it been the following evening, it could have been "Dog taking a dump" or something.

Well really, and at dinner time too!   Grin

Thank the Lord you signed up when you did and not 24 hours later....
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