New Tube for London - Terminating trains at Lane/ Uxbridge

The best solution would be to build a new platform at Rayners Lane on the south side where there are currently two old tracks. Major building work would be required to extend the bridge/ tunnel to enable the third platform to be accessible to the Piccadilly line.

This additional platform would provide a new turn around platform, enable easy interchange to the Met line and reduces conflict as trains terminating into platform 3 wouldn't hold back other services.

You can use both platforms at south harrow to reverse in so dont need to use the sidings but the problem would be most people want to go onto the uxbridge branch and without going rayners will have no way of getting there
Think the plan is (or was ) to carry on running trains to uxbridge even if new trains have to be driven manually on it

they was planning to resignal pic line but it got changed in latest contract as too expensive 


(b) revisions to the technical signalling solution on some of the sections where tracks are shared with other services: i. the Wimbledon branch of the District line, which is Network Rail managed, will now have an ATC signalling overlay rather than full resignalling (matching the established solution for the Richmond branch and consequently reducing design variants); ii. Piccadilly Line trains will not be fitted with new signalling equipment; iii. the section of the Piccadilly line between Rayners Lane Junction and Hanger Lane Junction will no longer be resignalled by the Programme; and iv. the signalling solution for the interoperable sections of the SSR and Piccadilly lines will include conventional signals to allow for continued operation of Piccadilly services on these sections. This solution will provide a suitable starting point for the subsequent New Tube for London Programme modernisation of the Piccadilly line;

and as for new tunnel think that will work out bit expensive which cant see them getting funds for .. also cant see the pic line  causing much of a delay driving manually down to uxbridge 

they will run on existing signalling to begin with then when all trains are delivered and 73s gone will run on new signaling when its installed that is .. thats the way its done on most lines i do believe 

No, the Victoria Line was done the other way round. The new Invensys/DTG-R signalling was overlaid on top of the old signalling, with interlocking etc still provided by the old signalling. This meant the 09 stock could run alongside the 67s

Believe a large (iirc 20m + in length) Signalling Equipment Room is soon to be built on the two disused sidings behind the Westbound Platform at Rayners Lane. I assume this would therefore rule out building an additional Platform there in the future, along with the current IMR being in the way too!

Not sure when the work is planned to take place. I've heard mutterings that 13 & 14 points (the trailing points allowing both Met and Picc trains to reverse off of Platform 1) are to be replaced in the late summer so perhaps then.

I didn't know either, but a quick Google finds an informative article about the 4LM or "Four Lines Modernisation programme", CBTC being the "Communications-based train control" proposed for it. The "four lines" are the SSL (subsurface lines).

It is 'Modernisation' - 4LM is the new name for the Sub-Surface Railway upgrade, currently under way.

Wait, so are they planning to fit another form of it, or is that just a reference to the ongoing scheme which is seeing the trains going back to Derby as mentioned here (which is past the consideration stage)?