On Thu, 5 Jul 2007, Charles Ellson wrote:

On Wed, 04 Jul 2007 23:24:39 GMT, "Richard J."
wrote:

Charles Ellson wrote:
On Wed, 4 Jul 2007 18:38:11 +0100, Tom Anderson
wrote:

On Wed, 4 Jul 2007, Graeme Wall wrote:

In message
"Peter Masson" wrote:

"sweek" wrote in message
oups.com...

Wouldn't it be relatively cheap to lengthen the platforms even
further? With the high level of overcrowding now and even more
passengers using the route in the future, it seems like it will
be needed. 8 coaches seems like a good number indeed.

Getting a 4-coach platform length at Willesden High level will be
expensive, but do-able. To get 8 coaches here, because of the
junction with the City Goods Line, the only place is on a bridge
over the WCML.

Not sure i buy that. How far is the junction from the present
platforms?

The junctions should be far enough away but expansion in either
direction from Willesden Junction High Level involves intruding into
space occupied by bridges. I would have thought that the easier
option would be expansion northwards (possibly with some
realignment) over the DC line involving two new (or one wide)
short bridges rather than messing about with the relatively
recently-installed bridge over the WCML.

I agree. A quick measurement on Google Earth of the westbound/down
platform, which is on the inside of the curve and therefore with less
room for extension, shows the current platform as about 72 m long, but
with room for expansion to at least 200 m before the gap between the
tracks gets too narrow for an island platform.

I'm not sure which is the "junction with the City Goods Line" that Peter
Masson mentioned, but the nearest junction east of WJ High Level is
Kensal Green junction which is about 400 m from the High Level
platforms.

The City Goods Line is the line leaving the WCML west of WJ which
passes over the DC line (bridge 26B?), then to the north of WJ DC line
platforms and joins the NLL to the east of the bridge with the
bendybus on it.

Quail just calls it the 'City Line', and puts the junction at 5 miles and
10 chains on the NLL, the platforms being at 5 miles 39 chains; 29 chains
is 583 metres. I don't know where on the platforms the 5:39 point is, and
there is a point before the junction where the down City crosses the up
NL. There's also a junction with what Quail calls the 'New' line, the link
from the DC lines to the NLL that Charles calls the City Line, at 5:13.
And, as Richard mentioned, not all of that distance is wide enough for
platforms anyway.

IIRC "Kensal Green Junction" covers the general area where the City
Goods Line joins the NLL on the north side and the City Lines (from WJ
New station) join on the south side.

Quail seems to use it that way. Although there's also a Kensal Green
Junction on the WCML next door!

tom

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DO NOT WANT!