On Sun, 12 Feb 2006 11:51:06 +0000 (UTC), "Paul Scott"
wrote:


"Boltar" wrote in message
roups.com...
I thought the signalling had been upgraded twice already? Wonder if
the max performance really is so much greater or its just manufacturers
spiel. If the jubilee and northen line trains could even get close to
the
performance of the central line trains it would be a good thing IMO.

B2003


IIRC correctly one of the biggest cost overruns on the extension was caused
by reversion to normal signalling after they couldn't get the moving block
stuff to work? That was probably 'spun' as an upgrade...

Paul

A new signalling system is being introduced on both the Jubilee and
the Northern lines as part of the PPP. It is an Alcatel SELTRAC moving
block system as used on the Kowloon Canton Railway in Hong Kong and
(in an earlier incarnation) on DLR. Introduction according to the PPP
is 2009 for Jubilee and 2012 for Northern. When this is done the
trains' performance will be notched up again.

New control systems also due for Victoria and Subsurface -
(Westinghouse "Distance to Go" Fixed Block") and for Piccadilly
(contract not let yet for signalling).

Paul