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Oxford Corridor Phase 2 & Platform 5 updates

BlueLeanie

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A local councillor recently asked on a West Oxford Whatsapp group when exactly Botley Road would reopen to through traffic.

It's worrying when a Councillor genuinely believes that the most reliable source of information isn't their Council, their leadership, or Network Rail.

On this occasion, they did probably get a fairly accurate answer. Besides it is open to through traffic. You are respectfully requested to dismount from your bike and push it through the tunnel though!
 
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Nicholas43

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Network Rail's 'Oxford Connect' bulletin issued on 28 November 2024 announced that their contractors will be removing the footbridge (immediately to the east of the rail bridge) during the weekend 7-8 December (2024), in preparation for replacing [? and widening] the rail bridge at a date they do not reveal. But which would, of course, entail a total rail blockade.
 

Mark J

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That would have been extremely short-sighted. The clearance under the current bridge is very poor, necessitating shorter than usual double-decker buses to be able to use it. There is also a future aspiration that Platform 2 may become through instead of a bay if the main station building is rebuilt, the bridge has been designed with this in mind for the future.
Platform 2.

Is that the Bicester/Marylebone Platform?

Interesting that future plans may see the line possibly passing through the existing rail station Concourse.

I'm guessing this may happen if the Cowley branch reopens.
 

SynthD

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Yes it is one of the terminating platforms, but no I don’t think it’s directly linked to Cowley. At one point it seemed like the follow-on of this project, but I’ve lost track of what’s been descoped.
 

Nicholas43

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Yes it is one of the terminating platforms, but no I don’t think it’s directly linked to Cowley. At one point it seemed like the follow-on of this project, but I’ve lost track of what’s been descoped.
The published intention was to future-proof the replacement footbridge so that it could, at some unspecified distant date, carry rails serving a new through track on the east side of the station. That in turn would depend on Oxford City Council finding a developer willing to throw money at expensive flats or labs or things-not-yet dreamt-of to be built instead of the present depressing big draughty shed. Discussion of all that belongs better in the speculative section.
Meanwhile, back on the ongoing 'Phase 2', it remains a mystery to me how and when the engineers are going to (a) prop up the tracks where the new abutments are to be built; (b) dig out big holes under the tracks; (c) build the new abutments; all with or without extended possessions.
 

cle

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Would that future state only have one bay therefore (for Chiltern/EWR) - or might a Zero be added also? Cowley dependent I suppose.
 

Nicholas43

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Would that future state only have one bay therefore (for Chiltern/EWR) - or might a Zero be added also? Cowley dependent I suppose.
The published plans for Oxford Phase 2 envisage
- no change for the existing bay platforms 1 and 2. From Dec 2024, these will accommodate 2 tph Chiltern from Marylebone, and up to 2 tph Chiltern driver training from Milton Keynes. There is no space for a platform 0.
- a new through platform 5, which could be used by trains to and from Bicester and beyond, if they can find a path to ladder across at Oxford North junction.
 
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12LDA28C

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The published plans for Oxford Phase 2 envisage
- no change for the existing bay platforms 1 and 2. From Dec 2024, these will accommodate 2 tph Chiltern from Marylebone, and up to 2 tph Chiltern driver training from Milton Keynes. There is no space for a platform 0.
- a new through platform 5, which could be used by trains to and from Bicester and beyond, if they can find a path to ladder across at Oxford North junction.

Extremely unlikely any Bicester-bound trains would use the new Platform 5 as trains would have to cross every other running line to reach it.
 

fishwomp

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The published intention was to future-proof the replacement footbridge so that it could, at some unspecified distant date, carry rails serving a new through track on the east side of the station. That in turn would depend on Oxford City Council finding a developer willing to throw money at expensive flats or labs or things-not-yet dreamt-of to be built instead of the present depressing big draughty shed. Discussion of all that belongs better in the speculative section.
Surely nothing to do with the City Council. This must be all railway owned.. and developers are always willing to throw money at somewhere like that, and the railway to take it. The challenge is ensuring the planning/design is appropriate - that's the council's job, at first, then higher powers when they get the wrong answer.
 

Nicholas43

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Surely nothing to do with the City Council. This must be all railway owned.. and developers are always willing to throw money at somewhere like that, and the railway to take it. The challenge is ensuring the planning/design is appropriate - that's the council's job, at first, then higher powers when they get the wrong answer.
It's off topic, and all about dreams for 2035 or later, but Oxford City Council has an 'Oxford station master plan', which "aims to transform Oxford Train Station to create a new transport interchange and a distinctive gateway to the city of Oxford."
 

JamesT

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cle

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The published plans for Oxford Phase 2 envisage
- no change for the existing bay platforms 1 and 2. From Dec 2024, these will accommodate 2 tph Chiltern from Marylebone, and up to 2 tph Chiltern driver training from Milton Keynes. There is no space for a platform 0.
- a new through platform 5, which could be used by trains to and from Bicester and beyond, if they can find a path to ladder across at Oxford North junction.
Thanks - was thinking more beyond and into the 'through road' era of p2 and what that would entail for platforms and running.
 

JamesT

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Ah yes - of course. A masterplan - what else could we expect :) I bet they only own the road ...
Not even that. It’s the County Council who are the highways authority.

Network Rail have previously identified Oxford as a bottleneck which requires improvement in order to provide the desired future level of service. Which is why we have current works.

Although it will inevitably be Network Rail who would have to build a new station, the City Council does have an interest in it. Paying for business cases and designs with a view to lobbying for the funding to make it a reality isn’t entirely outwith their remit. Especially if they can tie in regeneration of that end of Oxford at the same time.
 

Nicholas43

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Please could we stay on topic: Network Rail's schedule for completing the approved Oxford Phase 2 bridge replacement, and prospective platform 5? In particular, I remain perturbed that, as far as I know, they have not announced a date, or a scheme of work, for inserting under the existing tracks the new abutments for the prospective longer bridge spans.
 

JamesT

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Please could we stay on topic: Network Rail's schedule for completing the approved Oxford Phase 2 bridge replacement, and prospective platform 5? In particular, I remain perturbed that, as far as I know, they have not announced a date, or a scheme of work, for inserting under the existing tracks the new abutments for the prospective longer bridge spans.
Given how it's gone so far, I wouldn't be surprised if they're waiting for a solid completion date from Thames Water before announcing any further work.
 

BlueLeanie

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Please could we stay on topic: Network Rail's schedule for completing the approved Oxford Phase 2 bridge replacement, and prospective platform 5? In particular, I remain perturbed that, as far as I know, they have not announced a date, or a scheme of work, for inserting under the existing tracks the new abutments for the prospective longer bridge spans.
What's the point of publishing a date when the current works haven't completed yet?

Have some patience and look at a map. There's only a tiny bit of Oxford to the West of the Station, it's all fully accessible via the A34 by road, there are multiple active travel routes from West of the Station to East of the station, and only 1200 metres or a 12 minute walk from the park and ride to the station.
 

fishwomp

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Have some patience and look at a map. There's only a tiny bit of Oxford to the West of the Station, it's all fully accessible via the A34 by road, there are multiple active travel routes from West of the Station to East of the station,
I suspect the residents will at least enjoythe respite from Westgate Centre Christmas car park traffic.. it makes Botley Road utter deadlock this time of year!
 

Nicholas43

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This is a rail forum! I am concerned that Network Rail do not appear to have a grip on the sequencing and scheduling of their announced plan to build new abutments for new, longer, bridge spans, and to crane these new bridge spans into place during a short blockade (once said to be end-July 2023).
 

hwl

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This is a rail forum! I am concerned that Network Rail do not appear to have a grip on the sequencing and scheduling of their announced plan to build new abutments for new, longer, bridge spans, and to crane these new bridge spans into place during a short blockade (once said to be end-July 2023).
Given the problems so far why would they announce a date until Thames Water have completed the works? (other utilities works appear to be more progressed).

They almost certain do but aren't going public given previous issues.

The new abutment design is not conventional. The abutments are square cross-section concrete tube that will eventually contain the pedestrian walkways. These concrete tubes rest on piled foundation that are outside the current track footprint (e.g. piles to the East and West) that will be under the new P2 & P5 track and the gaps between them the existing 4 track bridge deck . The piling is minimal disruptive. Your own post #302 above gives a strong hint on progress and the last thing holding up completion of piling is removing the old foot bridge. Your post gave you a big part of your answer.

Works are normally agreed 18 months in advance which is the big problem.
 

DelW

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This is a rail forum! I am concerned that Network Rail do not appear to have a grip on the sequencing and scheduling of their announced plan to build new abutments for new, longer, bridge spans, and to crane these new bridge spans into place during a short blockade (once said to be end-July 2023).
There are ways it can be done. Many years ago (around 1990) I was heavily involved in a job to put a second span alongside an existing road under bridge, to enable the road through it to be dualled. This was below six tracks of the Brighton main line. There was no blockade, from memory we had quite a number of maximum ~52 hour possessions (about 0100 Saturday to 0500 Monday) and those were on no more than four tracks at a time, with trains running on the other two throughout. The possession times including lifting tracks and later replacing them ready for use on Monday morning. It was a complex sequence and needed a lot of temporary works, but it all went well. Unfortunately it was before the days of digital cameras, and I have no idea where my photos ended up. I kept my temporary works design calc's and drawings until I retired, but then they all went into the paper recycling skip.

(Edit: written before hwl provided more design information above)
 

12LDA28C

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These concrete tubes rest on piled foundation that are outside the current track footprint (e.g. piles to the East and West) that will be under the new P2 & P5 track and the gaps between them the existing 4 track bridge deck.

The new P2 and P5 track? You won’t see any new track for Platform 2 for many years, if at all.
 

Nicholas43

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...The new abutment design is not conventional. The abutments are square cross-section concrete tube that will eventually contain the pedestrian walkways. These concrete tubes rest on piled foundation that are outside the current track footprint (e.g. piles to the East and West) that will be under the new [that is, distantly mooted - nicholas43] P2 & [planned and, we hope, funded] P5 track and the gaps between them [and] the existing 4 track bridge deck. ...

Works are normally agreed 18 months in advance which is the big problem.
Many thanks for this, and apologies if it was already explained somewhere I ought to have read. Have I now got it right that the concrete square-cross-section tubes will rest only on the piles at their extremities, and thus, in a sense, will be bridges under [and at right angles to] a rail bridge, and over whatever Victorian-era detritus remains under them? And have I got it right that the tubes will be about 50 metres long? And therefore not the sort of thing you just order from the Travis Perkins website?
 

hwl

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The new P2 and P5 track? You won’t see any new track for Platform 2 for many years, if at all.
The new P2 bridge deck location will be the new footbridge across Botley Road location till that point years ahead. Describing it as P2 hopefully makes the location clear to everyone as it isn't the same alignment as the existing footbridge.

== Doublepost prevention - post automatically merged: ==

Many thanks for this, and apologies if it was already explained somewhere I ought to have read.
It hasn't really been explained so far
Have I now got it right that the concrete square-cross-section tubes will rest only on the piles at their extremities,
The extremities being east and west of the current bridge deck. At least 45% of the width will be supported (20+% at either end).
and thus, in a sense, will be bridges under [and at right angles to] a rail bridge,
yes the new P5 (and P2/new footbridge) bridges will be directly supported underneath the tubes, just the replacement for the existing 4track deck won't be.
and over whatever Victorian-era detritus remains under them?
no detritus in the piled area and most of the problems are off the tube alignments.
And have I got it right that the tubes will be about 50 metres long?
Probably around 45m.
And therefore not the sort of thing you just order from the Travis Perkins website?
Correct you want to be sure of the design before placing the final order.
 
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Nottingham59

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Probably a silly question, but why did they have to do anything to Botley Road bridge at all? Why not just build an entirely separate bridge alongside it to carry the extra tracks? And leave the old bridge with its brick invert and congested services untouched?
 

JamesT

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Probably a silly question, but why did they have to do anything to Botley Road bridge at all? Why not just build an entirely separate bridge alongside it to carry the extra tracks? And leave the old bridge with its brick invert and congested services untouched?
Because there’s not enough space under the current bridge. The work will allow a full height double decker to get under which it can’t currently, and provide more space for pedestrians and cyclists.
 

takno

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Because there’s not enough space under the current bridge. The work will allow a full height double decker to get under which it can’t currently, and provide more space for pedestrians and cyclists.
Whilst that's true, it's unclear why Network Rail should care - put like that it sounds like a local council project which Network Rail should be treating with the same level of urgency as Thames Water are.
 

swt_passenger

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Whilst that's true, it's unclear why Network Rail should care - put like that it sounds like a local council project which Network Rail should be treating with the same level of urgency as Thames Water are.
Because if NR put in more bridge spans without any road alterations they’ll reduce the road height clearance even further. The existing road has/had a steep slope down either side, it’s not level.
 

Nicholas43

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Whilst that's true, it's unclear why Network Rail should care - put like that it sounds like a local council project which Network Rail should be treating with the same level of urgency as Thames Water are.
Because, to be given the necessary Order under the Transport Works Act which authorized the whole scheme, Network Rail had to show that the scheme would be in the wider public interest.
 

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