On Aug 10, 8:09*am, Paul wrote:
[snip]
One (relatively cheap) proposal would be to extend the Northern Line
from Morden to Morden South and provide an interchange with the
station on the Wimbledon - Sutton loop. *This would be useful for
people living in the Sutton area. On the other hand, it might overload
the Northern Line, which wouldn't go down well with people in Tooting,
Balham and Clapham. *Would this be feasible if the Northern Line were
ever permanently split in two?

The City branch of the Northern line is already crammed solid during
rush hour - even if the line is eventually split, and super-dooper new
ATO signalling means services can run more frequently, it still
wouldn't create the kind of capacity that could cope with untold extra
passengers joining the line at a new station south of Morden.

I think conversion to tram operation (as part of Tramlink) would be
the most promising course of action for the Wimbledon-Sutton 'wall of
death' line, though quite how that'd be handled at the Wimbledon end
is another question. Well, for that matter, how it'd be handled at the
Sutton end is also a very valid question!