"Tom Anderson" wrote in message
h.li...
On Mon, 3 Dec 2007, Roland Perry wrote:

In message , at 15:03:14 on Mon, 3 Dec
2007, R.C. Payne remarked:

Why will the dwell times here be longer than other stations? I'd have
thought somewhere like City Thameslink or London Bridge would have
just as much excuse to have long dwell times, and wherever the
location of the voltage change also has a good reason to offer long
dwell times, what's so special about this station?

It's where two lines meet and merge. So you can only get the maximum
throughput if trains arrive from the two branches interleaved exactly
on time.

Is it? I thought they met and merged north of the station, and shared a
single 2 track approach from the north. If that is the case, then they
will have to interleave exactly regardless of whether the station has 2
or 4 platforms.

The lines from the ECML aren't in place yet,

No, but the tunnels for them (the Canal Tunnels) are - they were built as
part of the CTRL works. AIUI.

but if they merge before the station it would make things worse.

I'm all but certain that there is not a four-track approach to the station
from the north.

I can't find maps or diagrams giving any details, though. Possibly people
who are more au fait with council planning department websites etc might
do.


The merging tunnels to the ECML are visible from passing trains, just north
of the station box. At least the northbound track has been built as a dive
under, rather than a basic flat junction, which will be the situation south
of Blackfriars.

Paul S