On Mar 4, 11:07*pm, Tom Anderson wrote:
On Thu, 3 Mar 2011, wrote:
On Wed, 2 Mar 2011 22:34:44 +0000
Tom Anderson wrote:
Specifically, i think it's that there isn't room for a double track
bearing freight trains with overhead. Freight trains being taller than
passenger trains (passenger trains all fit in W6A in this country, i
believe; squinting at a map from 2004, it looks like the Canonbury curve
might be W9).

I don't think its the height so much as the profile. Passenger trains
curve in towards the top whereas container freight wagons are a box
shape which tend not to work in tunnels where the curved roof would cut
in on the boxy corners.

Iggsacktly, they're taller at the edges!

Could hack a bit out of each side of the tunnel, as at Crown Street!

http://www.disused-stations.org.uk/l...t/index4.shtml