On 9 Feb, 00:05, "Richard J." wrote:


I don't think Ian Brown has been "very clear", despite what he claimed.
* He makes it sound as if TfL are doing the "physical stuff", and then
Network Rail will do the new signalling later. *But surely all the
4-tracking work, new crossovers etc. will be done by Network Rail or
their contractors? *What about the signalling for the new or changed
track? *Will that be cobbled together à la Jubilee Line and then
replaced post 2012 or what?

Network Rail's agreement to this change of plan would be crucial, yet he
makes no mention of that. *Extraordinary.

And can the 8tph timetable for 2012 be supported reliably by the
existing signalling ?

Can anyone throw any light on this "decision"?


The original plan was for the resignalling of the whole line to happen
after the Olympics in 2013, at the same time as the four tracking /
freight loops were extended through Camden Road station. At some
point, NR decided to bring the resignalling forward to coincide with
the ELL works, but there would still have been further work to have
been undertaken later. What is unclear to me is whether the postponing
of the resignalling will lead to the loss of the freight loops to the
east of Camden Road as well. It is these, together with extra signals
to shorten the headway, that gave the necessary capacity increase to
allow the 8 tph.