(01-09-2010, 08:37 PM)Archie Wrote: Can anybody be so kind to inform me what sort of signalling practice is now used on the Underground for 'new works' particularly on the Northern Line?
Many thanks
Thales (ex Alcatel) Seltrac transmission based signalling.
See http://en.wikipedia.org/wiki/SelTrac for some basic info; hopefully someone else will give you more info
There is quite a bit of London Underground signalling information available from:
http://www.trainweb.org/tubeprune/index.htm
PJW