wrote in message

On Apr 9, 9:49 am, wrote:
On Thu, 09 Apr 2009 03:58:36 +0100



Barry Salter wrote:

Recliner wrote:
wrote in message


Are they also planning to upgrade signalling system on the
Metropolitan line?

Long story... Metronet was planning to, but the contract was
cancelled after it went bust. It's still likely to happen, but a
few more years into the future, and using a different system
(thank goodness!). TfL isn't exactly flush with investment funds
thse days.

The fun bit will be if the proposed ATP system (originally proposed
to be the latest revision of SELCAB, I believe) *isn't* backwards
compatible with that fitted to the Chiltern Railways fleet.

Wouldn't this new system have to be fitted not just to the met but
the
H&C, circle and district too if they want the S stock to be
interchangable on all lines? Or will we be back to the old situation
of certain trains only being able to run on certain lines because
someone in times past had bugger all common sense (A stock being too
wide for parts of the district line for example)?

Yes, of course the new system is being fitted to the whole SSL.

Indeed so, but the original Metronet plan was to use a different system
to that planned by Tubelines for the Northern, Picc and Jubilee lines.
Given that the Picc shares tracks with the Met and District, this could
have caused real chaos at Ealing Common and Rayner's lane, as well as
round Wembley Park.