"Mr Thant" wrote in message

On Apr 9, 12:16 pm, wrote:
Hadn't they notice that the picc and met share the same track between
rayners lane and uxbridge?

Of course they had. The plan was (I think) to have both systems
installed on the track. As long as each one knows where all of the
trains on the section are, there's no problem.

As far as I know, no new contract has been awarded, so it could still
go to a contractor who uses a different system to the Piccadilly
(which will likely get Alcatel S40 - the same as Jubilee (being
installed), Northern (planned) and DLR (in use for years) - due to
being controlled by Tube Lines.

I would imagine that there's now a very high probability that the SSL
will share the same signalling system as the JNP lines.