On Sun, 10 Jan 2010 08:41:28 -0800 (PST), MIG
wrote:

If you start going that far, there are step-free changes on all routes
as long as every line has at least one step-free change to another and
enough of them have two. This is probably the case.

So, problem solved (at least by the usual definition here) and anyone
who finds it inconvenient is an idiot who ought to live somewhere else.

That's a bit extreme. The Circle Line had a problem of atrocious
punctuality, day in day out. This is an attempt to solve it.

What, OOI, would be your suggestion to prevent the situation that
occurred before, e.g. half hour gaps in service followed by 4 trains
together? People wouldn't like trains sitting at Aldgate for 20
minutes' recovery time (the only other place where it would really
make sense to hold them as they're completely out of the way there).

Neil

--
Neil Williams
Put my first name before the at to reply.