Interesting, though 4 stations under Manchester seems excessive for a Trans Pennine service whose frequency won't suit inner city short hops .... better to have one at Piccadilly then a parallel Metrolink tunnel taking the local traffic. Also, the lack of a connection to the Bolton line means it doesn't relieve Castlefield of those, unless they are going via Parkside Jn; or of a connection to the south east of Piccadilly. In short, a classic British unimaginitive compromise.
Multiple stations are needed due to having to run thousands of people through castlefield to plat 13/14 then through the station to HS2. Salford interchange is a must. Salford quays relieves Metrolink. Lincoln Sq is a station serving the financial sector of spinningfields and the civic area.
CrossNorth has a Thameslink style core (multiple stations) with about the same distance covered either side. It is a very good and successful comparable which has created through long-distance services through London at the same time relieving tube lines and so forth.
The business case for CrossNorth is strong and I can see it being seriously considered by any government.
Also re Bolton, the Scottish intercity services through here would initially run via chat moss, then via the new line in phase 2 on a chord to the WCML. The stoppers would be metro and run via either Victoria or Piccadilly with everything stopping at Salford interchange. A vital station removing the need for passengers from the north having to traverse castlefield to reach Piccadilly.
If you are going to build a tunnel, you might as well get value for money out of it. CNP relieves Metrolink thereby removing the need for a tram tunnel on a similar alignment.
The stopping patterns would have dwell times equivalent to Thameslink and most “short hops” would be limited, with only Salford Quays-Piccadilly being a regularly used commuter route. The existing surface tracks run as metro providing extra capacity to Cornbrook & Warrington.
12+ tph through both the castlefield corridor & via Victoria will become possible stopping at every station including deansgate and Salford central. Currently no plan allows that.
A compromise? Partly in the sense that it doesn’t run via the airport directly, otherwise it is a great win for the north and the start of a Cross North railway that can be built in phases. Something much more likely to be delivered than an “all in one hit” solution that also involves waiting for HS2 to arrive in Manchester c2045. Phase 1 of CNP could be designed and built well within a decade. Even if there’s an extra few years of policy making and passing bills etc it will still be delivered sooner and be more beneficial to more people.
I wouldn’t call that a compromise!
We’re also looking into using it for overnight freight with a depot in Trafford park. This solves the noise pollution issue that limits overnight freight through the city and takes them off castlefield. The tunnel would get 24h usage.