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Journey by Journey => London to the Cotswolds => Topic started by: Btline on July 02, 2015, 21:42:47



Title: They re-doubled the wrong section...
Post by: Btline on July 02, 2015, 21:42:47
Took the Cotswold line for the first time in ages recently, wanting a change of route. Will not do again in a hurry.
I've forgotten how slow the journey is, with pointless stops to allow few, if any, passengers to board/alight.

But my main gripe were the slack operations and delays. Nothing has changed.

1) Fair enough, due to LM delays at Worcester, the empty train did not arrive until 2 mins before departure. But we left 5 mins late, with no urgency to get the train off. Why bother I suppose, when there is so much slack in the timetable?

2) Between Worcester and Charlbury we picked up an extra 5 minutes delay for no real reason. Slow deceleration/ acceleration at stations (despite being a 180 and no rain). A wait of a minute before the doors were released at Pershore. Long dwell times at all stations despite there being no SDO and few passengers.

3) As a result, we delayed a Northbound service at Evesham.

4) At Charlbury, we were delayed further by the next northbound service, although didn't get off until the other train had arrived (despite the double track starting a few miles away).

5) Further delays at Oxford, Didcot, etc as we had lost our path. No doubt we caused a queue behind us when we called at Slough on the fast lines. We also delayed a Heathrow Express, which was stuck on the flyover.

Had they doubled Honeybourne - Pershore and South of Hanborough to Charlbury as I have suggested many times, BOTH of these delays would have been avoided. Trains cross at the ends of the double track, which means they are still getting delayed! There seems no way around this timetable wise.

I want this line to improve!


Title: Re: They re-doubled the wrong section...
Post by: Chris from Nailsea on July 02, 2015, 21:47:01
Hi, Btline - it's good to hear from you again, after such a while!  ;) :D ;D


Title: Re: They re-doubled the wrong section...
Post by: ChrisB on July 03, 2015, 11:04:50
With the summer review of CP5 spending, you've got a long wait unfortunately


Title: Re: They re-doubled the wrong section...
Post by: IndustryInsider on July 03, 2015, 18:48:06
4) At Charlbury, we were delayed further by the next northbound service, although didn't get off until the other train had arrived (despite the double track starting a few miles away).

Charlbury Junction isn't 'a few miles away' from the station, it's actually just 0.3 miles away.  Even super quick work by the signaller and train crew means that a train will only be departing as a train coming the other way draws to a stand in the opposite platform.   ::)


Title: Re: They re-doubled the wrong section...
Post by: ChrisB on July 03, 2015, 20:34:33
Exaggeration is BTlines middle name :-)


Title: Re: They re-doubled the wrong section...
Post by: Steve Bray on July 05, 2015, 11:40:46
But BT Line make's a point, or one of two! My Mum was on the 1821 PAD-HFD yesterday and that was delayed at Evesham waiting for the single line to clear, which is frustrating when you are wanting to get home promptly after a long day out. I've probably said it before, but I'ld have doubled Norton Jcn to Honeybourne. Anyway that didn't happen and we are left with what we are left with! 


Title: Re: They re-doubled the wrong section...
Post by: ChrisB on July 05, 2015, 13:07:39
All 3 options were tested for improved running times, timetable options - and the track that was doubled showed the best business case.


Title: Re: They re-doubled the wrong section...
Post by: Btline on July 12, 2015, 20:18:12
All 3 options were tested for improved running times, timetable options - and the track that was doubled showed the best business case.

They obviously did the testing wrong.
I suspect they picked the cheapest option.


Title: Re: They re-doubled the wrong section...
Post by: ChrisB on July 12, 2015, 20:47:23
Thats total b.....rubbish.

The piece between charlbury & Wilvercot junction costs far less than what they did....as does the bit you suggest. They did the most expensive actually, just that they didn't have enough to do all of it!


Title: Re: They re-doubled the wrong section...
Post by: eightf48544 on July 13, 2015, 09:43:52
I tend to agree with Btline that it would have been better to do Wolvercote as far as possible and Norton Junction as far possible with a possibly lengthened loop in the middle.

It seems best to me to be able to get a train off the mainline to wait rather than the block the mainline. I know they are partly able do it with the use of the goods loop North of Oxford but the train still has to block the mainline to enter the single line and the single line has to be clear to Charbury.

It also works the other way round in that a train off the single line can wait at the junction to get onto the mainline and not block a train entering the line.

A place where this works is Leamington Spa to Coventry where you have double track both ends and the dynamic loop at Kenilworth. You often pass another train whilst both moving.


Title: Re: They re-doubled the wrong section...
Post by: ChrisB on July 13, 2015, 10:12:22
I'm sure the professionals looked at this & would have come to a reasoned decision, don't you?


Title: Re: They re-doubled the wrong section...
Post by: eightf48544 on July 16, 2015, 09:44:38
I seem to remember that it was the problem with the age of the signalling at Oxford and Norton Junction that was a factor in not adding a length of double track onto the single line to allow trains to get off the main line or wait for it to clear. Which to me has clear operational advantages.

Thingley Junction to Bradford North is an even more extreme example of where there is no double track at the junction or a passing loop. This severely limits the potential capacity of the line.


Title: Re: They re-doubled the wrong section...
Post by: ChrisB on July 16, 2015, 09:49:32
Network Rail & FGW never mentioned that in briefings on the redoubling if that is/was the case.


Title: Re: They re-doubled the wrong section...
Post by: 4064ReadingAbbey on July 16, 2015, 11:33:01
Network Rail & FGW never mentioned that in briefings on the redoubling if that is/was the case.

That's odd because it was certainly mentioned in the railway press (unfortunately I have no reference to hand) that in the case of Wolvercote Junction redoubling would have to wait on the Oxford re-signalling otherwise the cost would have been excessive.


Title: Re: They re-doubled the wrong section...
Post by: IndustryInsider on July 16, 2015, 13:06:45
Yes, that's the main reason as far as I'm aware.  I believe the original intention was to have the track doubled slightly further towards Finstock, but that would have meant replacing a low bridge just to the east of where Charlbury Junction was finally positioned. 

The budget was stretched as it was, with plans to move signalling control to the TVSC Didcot delayed/cancelled.  Further costs would have been incurred sorting out the issue of expensive modifications (or closure) of Finstock, Combe and Hanborough.  The same problems would have occurred at the other end with a new platform possibly needed at Pershore and alterations at Norton Junction and a bridge replaced between the two - depending on how far you did.

Also, there's the additional cost of the switches and crossings (and signalling to control them) that would be needed if the formation between Wolvercote and Norton went single-double-single-double-single as opposed to the current single-double-single layout.

Those items would all have pushed up the cost considerably, and whilst the current layout is not ideal the timetable should improve dramatically when there's a wholesale recast for the IEPs, which up until now hasn't been possible.  It also becomes easier to do the remaining sections in the future now that the tricky middle bit with all the crossings and tunnels has been dealt with.


Title: Re: They re-doubled the wrong section...
Post by: John R on July 17, 2015, 21:46:18

Thingley Junction to Bradford North is an even more extreme example of where there is no double track at the junction or a passing loop. This severely limits the potential capacity of the line.

Never mind, it's only used by a few passenger trains a day, and with a few freight paths thrown in as well.  Now if it were to find itself being used for frequent long distance intercity services then it might be a problem, but that would never happen, would it...


Title: Re: They re-doubled the wrong section...
Post by: CLPGMS on July 18, 2015, 10:59:45
Quote
I believe the original intention was to have the track doubled slightly further towards Finstock, but that would have meant replacing a low bridge just to the east of where Charlbury Junction was finally positioned. 
I heard the same story as IndustryInsider.  The original intention was to have a similar length of double track east of Charlbury to that which was provided west of Evesham.  This would have allowed trains to depart from Charlbury just before those from the Oxford direction arrive.

There was also a story going around a few years ago that doubling track at Hanborough would be a problem due to a similarly shaped bridge which carries the busy A4095 over the railway at the station.  The bridge at Charlbury just carries the access road to Cornbury Park.

I also believe that it was not considered worth doubling Wolvercote and Norton Junctions, due to future plans for signalling in the two areas.


Title: Re: They re-doubled the wrong section...
Post by: Andrew1939 from West Oxon on July 18, 2015, 14:51:28
The last report I read on the Oxford area re-signalling was that extra work is need in Oxford for Chiltern train terminations and that cut backs elsewhere were necessary including only "passive re-signalling provision" for Wolvercote Junction. What passive provision means was not explained.


Title: Re: They re-doubled the wrong section...
Post by: ChrisB on July 18, 2015, 15:09:48
Connections made/allowed for but work to the signals not done


Title: Re: They re-doubled the wrong section...
Post by: Witham Bobby on July 20, 2015, 16:38:18
Quote
I believe the original intention was to have the track doubled slightly further towards Finstock, but that would have meant replacing a low bridge just to the east of where Charlbury Junction was finally positioned.
I heard the same story as IndustryInsider.  The original intention was to have a similar length of double track east of Charlbury to that which was provided west of Evesham.  This would have allowed trains to depart from Charlbury just before those from the Oxford direction arrive.

Can down trains depart towards the single line at Evesham before one arrives on the up?

I've no hair left, but it would be standing on end, as I don't think that there's another signal beyond Evesham towards the single line which would prevent a down train that had departed from Evesham entering onto the single line at Evesham West Jcn, which would be a bit of a problem if the up train had not cleared that single line.

I'm sure operational flexibility would be greatly improved if the signalling allowed this, but I don't think it's the case.

And wouldn't it be a better use of money east of Charlbury if there was to be a short section of two-tracks and a doubled junction at Wolvercote, rather than a longer stretch of double line extending what's already there at Charlbury?  This would allow trains to pass off the Down Banbury line onto the OWW whilst waiting for an Up train from the Cotswolds to clear, leaving the more important route clear and freeing up things at Oxford station massively.


Title: Re: They re-doubled the wrong section...
Post by: ChrisB on July 20, 2015, 16:48:54
And wouldn't it be a better use of money east of Charlbury if there was to be a short section of two-tracks and a doubled junction at Wolvercote, rather than a longer stretch of double line extending what's already there at Charlbury?  This would allow trains to pass off the Down Banbury line onto the OWW whilst waiting for an Up train from the Cotswolds to clear, leaving the more important route clear and freeing up things at Oxford station massively.

Yes, agreed.


Title: Re: They re-doubled the wrong section...
Post by: CLPGMS on July 20, 2015, 17:57:07
Quote
Can down trains depart towards the single line at Evesham before one arrives on the up?
YES.  Once an up train has cleared the single line a mile or so from Evesham, the signaller can reset the system to change the signal at  the end of the down platform to green.  Quite often, trains can be seen passing one another between Evesham station and the junction - usually somewhere by the signal box.


Title: Re: They re-doubled the wrong section...
Post by: Oxman on July 20, 2015, 19:09:50
As part of the enhancement projects at Oxford (in conjunction with the redoubling), the down goods loop was upgraded for passenger use. This allowed a down Cotswold train to clear the platform at Oxford and wait in the loop for the single line to clear. This was immediately very useful and continues to be so, AIU.

I believe that there was a subsequent project to extend the down loop further towards Wolvercote Junction, which would further reduce delays. Has this been completed?

Converting the loop to passenger use was cheaper than doubling Wolvercote junction with much the same result.


Title: Re: They re-doubled the wrong section...
Post by: IndustryInsider on July 20, 2015, 22:16:41
I believe that there was a subsequent project to extend the down loop further towards Wolvercote Junction, which would further reduce delays. Has this been completed?

Waiting track to be laid.  Not sure it can be finished until Oxford Panel Box closes and Didcot TVSC takes over.



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