Apologies if this has been raised before (I cannot find any references in a search of the site), but I'm wondering whether there will be total separation between the two lines as between Barons Court and Acton Town West/Northfields, with no 'working over' possible, as I believe there is between the Met. and Jubilee lines between Finchley Road and Wembley Park (except for access to/from Neasden depot), or will the present arrangements be continued?
I should think that the loss of operational flexibility, and District access to/from Barons Court Siding for engineers' trains and the fact that the two lines share the same tracks between Acton Town West and Hangar Lane Jn would make such a separation impracticable, but it would be good to know what is planned.
To my knowledge it’s not cancelled and still going ahead but the S stock will no longer travel down the fast and when it is resignalled the 73 stock will not be able to travel down the locals as the train stops will be removed
Area's which will still have "normal trains" running on them and therefore require physical colour light or shunt signals are to be known as interoperable area's. The current physical colour light and shunt signals are known as the legacy system when talking about the new CTBC (Communications Based Train Control) world.
In simple terms it'll either be underlayed, so the CTBC signalling controlled from the new Hammersmith SCC (Service Control Centre) will control the legacy signalling, or overlayed which means the new CTBC system will be driven by legacy system.
So, where dual running of CTBC and legacy rolling stock is to take place, the CTBC element will work like this:
Metropolitan Harrow on the Hill to Amersham - underlayed Metropolitan Rayners Lane to Uxbridge - underlayed
District East Putney to Wimbledon - overlayeded District Gunnersbury to Richmond - overlayed District Acton Town to Ealing Broadway - overlayed