On Mon, 28 Aug 2006 11:40:18 +0100, Paul Corfield
wrote:


Metronet are using Westinghouse's "distance to go" moving block
signalling.

http://www.metronetrail.com/default....=1080661114828
http://www.metronetrail.com/default....=1078652965937

Tube Lines are using the Alcatel system that works on the DLR, Paris RER
and the Skytrain in Vancouver.

There has been a fair amount of detail about both signalling schemes in
Modern Railways over the last year or so.
I believe - and I'm ready to be corrected - that DTG is fixed block
not moving block. Alcatel's S40 system is moving block (and as far as
I know isn't used by RER - the other main reference site is KCR's
WestRail in Hong Kong).

P