In article
s.com, Mizter T scribeth thus

On Sep 11, 8:33*pm, tony sayer wrote:

In article , Roland Perry
scribeth thus

In message
, at
07:53:32 on Sun, 11 Sep 2011, Mizter T remarked:
Fitting equipment in deep level tunnels however isn't
that easy a proposition - there'd need to be a near enough as can be
100% guarantee that it wouldn't catch fire, nor interfere with any
safety critical LU kit such as signalling or comms, plus there'd be
the very real issue of maintenance access.

They fitted mobile access into the Heathrow Express tunnels years ago.
Also the tunnel on the Oslo airport express. None of the issues you
mention would be special to the London tubes.

Wouldn't be any problem at all Google "leaky feeder" if your interested.

Plenty of it in tunnels already!...

I know about leaky feeders, but I'd posit that they don't seem to
offer the completely painless trouble free solution that you suggest,
lest it would have happened already. My guess is that the problematic
issue is in installing equipment at the stations to service any leaky
feeders.


Shouldn't be just consider it as a very long leaking coax cable. If you
need to extend it you just repeat it as such...

The installation of the cross-track video projectors (to project ads
on the far side of the tunnel wall) shows that where there's a will -
i.e. lots of dosh - there's a way, but thus far there doesn't seem to
have been enough of a will/ enough wonga to have make it happen.

Well personally I find the tube LOUD enough without more noise "I'm in
or on the underground!!!"
--
Tony Sayer