wrote:

On Tue, 15 Feb 2011 16:07:37 -0000
"Mizter T" wrote:

"an abuse" - that's rather strong. Truth is, everything hinges on the new
SSL signalling system, which is some years off still. Without the new
signalling system there's no data feed for any such 'train describer'
boards. In essence it's in the pipeline, just that the pipeline is a
bloody

So when did the data feeds for the lines that do have them get put in
place?
As I said in another post , the northern line had these installed back in
the 80s. Was a major feed install done then?

I'm really no expert on signalling, but the sub-surface lines are way behind
everything else - bits of it are prehistoric. The fact this has only started
to be addressed within the last decade or so shows the continued neglect
shown by successive governments of different hues (and then when the Labour
government finally decided it had to be addressed, they did so through the
flawed vehicle of the Tube PPP).