Wouldn't the crossovers be permitted development? If so I think they could be added to the scheme without affecting the TWAO.
I'd have thought so, but the issue now is cost/benefit.And changing anything is likely to add more delays!
In the short term to keep costs low, couldn't you just keep Dore and Totley as 1 platform with the stopping trains crossing over to stop? It will mean that the full potential of the dual tracking won't be felt but for the short term, surely it has to be better than the current bottleneck.
Given how little needs to be done for this project, it has a stupidly long deadline and costs are just out of this world. No wonder small but effective improvements aren't done but the huge, overpriced schemes are planned and approved so quickly.
It's no wonder the railways can be in such a mess with the TWAO!
The double track and new platform will be done together or not at all, of that I'm certain. That was the original part of the scheme going back to before 2005.
Originally the full scheme put to consultation in 2014 envisaged 4 fast trains an hour, a slow, and freight paths. That got reduced to 3 fast paths, not least because there isn't capacity from Hazel Grove and Stockport (or Marple) into Piccadilly and it's getting tight from Dore into Sheffield. However threading them reliably through the Hope Valley was also hard to do.
Some think even 3 fast trains an hour will be hard to achieve. Certainly getting them to run reliably at 20 minute intervals seems impossible with freight and stopping service to squeeze in.
Which brings us to details, and it's the details which make schemes work, or not.
At present the Hope Valley stations, Edale, Hope, Bamford, Hathersage and Grindleford are all in the bottom 50 in the table of British stations - judged on worst punctuality of trains! (4 Northern hourly return services have been cancelled today, which is another story.)
Users of the line hear fast train operators blaming stopping trains, stopping services blaming the fasts and both blaming freight services. The last few days illustrate one part of the problem, and one that won't be fixed by redoubling at Dore.
TPE are running a shuttle service between Manchester and Sheffield because lines are flooded between Doncaster and Scunthorpe. That's tight because the fast follows the slow into Sheffield and needs to go out again before the stopper. Inevitability the stopper must be late.
It's not unusual for the TPE service to be late into Sheffield from Doncaster, thus ensuring its path at xx11 is missed quite often. The xx14 stopper may be held in the platform or released to the Heeley loop. Either way it has missed its path to cross the northbound mainline tracks at Dore Station Junction. 6 hourly mainline services by XC, East Midlands and Northern pass that way and it should be able to cross fairly easily, if they are on time, but many are not. That may delay at least one of them further, or the stopper. It's not uncommon for the stopper to be ready to depart on time but be held for the TPE and to cross the mainline, arriving at Dore 10-20 minutes late.
The optional crossovers would permit bi-directional tracks between remodelled Dore Station Junction and remodelled Dore West Junction. That would allow the stopping service to clear the Sheffield platforms on time and pass Dore Station Junction as pathed to reach Dore Station on time and be ready to leave. The TPE service could then overtake and the stopper follow roughly 3 minutes behind out of Dore. At present it will follow across the station junction at best 3 minutes behind before slowing down to stop at Dore and accelerate away again now at least 5 minutes late.
Does that matter? A little because it will be late all the way down the valley and probably into Piccadilly where it may obstruct other services. If further delayed in the Hope Valley it can delay the following East Midlands fast service.
Add an extra fast service and the impact of any delays would multiply.
At present the loop at Earles Sidings is not used for passenger services and there seems no intention for that to change. Steam specials often pull in there so it can be done. Maybe it will need to be considered in the future.
Returning to the potential benefits from the optional crossovers it should be noted that the original scheme called for the Bamford loop to be at Grindleford to allow freight services to pull in as near as possible to the mainline. Going South after Bamford they can do that again, on a tight rising curve, in the new loop at Dore. Going north it's pull in at Bamford or obstruct traffic almost into Sheffield. With bi-directional at Dore a freight could be overtaken.
In the eastbound direction the Bamford loop will be engineered and signalled for passenger use so the stopping service may be less of an issue with overtaking possible there.
At present the eastbound stopping services are unreliable for several reasons that the capacity scheme can't prevent, but it may help reduce further delays. Westbound trains can be late arriving from Sheffield. Delayed other trains can mean wrong platforms need to be used with wrong platform order resulting in another train coming in behind like the TPE for Middlesbrough preventing timely departure. Stoppers can be delayed 15 minutes or more at Chinley to let an East Midlands fast through, itself delayed at Castlefield.
Freight for Earles coming in from the west has to cross onto the opposite track and reverse in. That can take 15-20 minutes blocking both tracks. Trying to cram too many people into Pacers adds to extended dwell times. Longer trains could solve that one.
The scheme will be done. It should be available by the May 2024 timetable (my forecast), although December 2023 is still the aim of Network rail. Our political masters want it sooner. The detailed planning isn't sufficiently advanced to achieve that.
But we need to see it completed in such a way as to give the maximum benefit not only for current services, but that extra fast train, a full hourly stopping all station service and extra stops at Hope and Dore. Dore used to have a much better service in and out of Sheffield in 1938, today it only has one train an hour for most of the day, with gaps up to 2 hours 33 minutes in the evenings out of Sheffield!
How it was. Current Dore users would love to get this back. I's currently much easier to get to and from Manchester!