On Aug 2, 12:53 am, TheOneKEA wrote:
I saw an old picture once which appeared to be of the southern end of
the Canonbury Curve; it showed a four-track mainline heading west into
the left-hand upper corner of the photo, with a double-track flat
junction splitting from the right-hand pair of lines and curving away
into the right-hand upper corner of the photo.

Is there space at the southern end to construct a medium-speed
(30-40mph) flyover for down trains to Finsbury Park?

No:
http://maps.google.co.uk/maps?f=q&hl...&t=k&z=17&om=1

It's all in steep-sided cutting in a dense residential area. The
tunnel mouth isn't far from the junction, and there are road
overbridges either side on the main line that would need rebuilding.

You'd want a flyover for both tracks because passenger trains need to
cross the NLL freight line (which is the northern of the three).

U

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