On Wed, 8 Jun 2005 00:22:00 +0100, Tom Anderson
wrote:

It wasn't until Hutchison, in 1960, that interchanges went black:

About the only good feature of that abomination.

This is sensible, though, since it deals with the conundrum of which line
interchange stations should take their colour from. That said, i really
like Beck's pre-1960 maps, where interchanges consist of one circle on
each line (in the line's colour).

I think that in some locations (Charing Cross/Embankment springs to
mind) it looks absurdly crowded.

Mad props to this excellent website on the history of interchange
symbology:

http://www.ursasoft.com/maps/LURS/

A lovely diversion for twenty minutes or so. I actually really like
the dot-in-circle for mainline interchanges.