Tom Anderson wrote:

How about having cross- or same-platform interchange shown by having
both lines go through a single circle, rather than having two joined
circles?

Bizarrely I came to the same conclusion less than a minute before reading
your post. I also think that the Vic and Northern should go through their
shared circle in a north-south direction to make the direction of the
cross-platform interchange clear.

This might make the map look a bit simpler, too. Or are you
reserving that for shared tracks only?

There is no reason for a passenger looking at a tube map to be told which
interchanges are shared-track and which are cross-platform.

Incidentally, can i bring to people's attention the following science:

http://www.tom-carden.co.uk/p5/tube_..._times/applet/

You certainly can, and thanks!