On 14 June, 12:28, Roland Perry wrote:
In message . li, at
11:08:01 on Sun, 14 Jun 2009, Tom Anderson
remarked:

http://www.oobject.com/category/12-o...inating-tunnel
-networks/

But not bad!

The top set of escalators at Piccadilly Circus seem to go through a
mystery right-angle on that diagram.
--
Roland Perry

Perhaps related to the Bakerloo being mysteriously straight.

It also implies that the platforms cross over each other, when at
nearly every such interchange, including Piccadilly Circus I'm sure,
only the running tunnels cross, with the upper tunnel vertically
overlapping the ceiling of the line below, but beyond the ends of the
platforms.

In fact, isn't that the reason for the Bakerloo station having to be
extended over the crossover at the north end, because extending the
other end would encroach on the ceiling of the eastbound Piccadilly?