Clive D. W. Feather wrote:

In article .com, John
B writes
In general, it seems to me that the Victoria line was a high point in
terms of easy connexions - cross-platform interchange wherever
possible, often created thanks to considerable ingenuity.

But why didn't they go for x-platform at Green Park and Warren
Street...?

Green Park is due to simple geometry: get a map and remember that the
Piccadilly is running under Piccadilly with the station under the
intersection with Dover Street. Now try to construct a route with
reasonable curvature that gives you cross-platform interchange. It's
just not practical.

Quite - having cross-platform interchange would have introduce a
massive kink into the Victoria line, which would have gone against
it's 'fast and straight' philosophy.


Warren Street was deliberate. In the early 1960s there was much more
traffic on the Charing Cross branch of the Northern than the Bank
branch. Therefore the interchanges with the Victoria were deliberately
arranged to encourage people on to the Bank branch and not to use the CX
one, thus evening up the flows somewhat. In hindsight that may seem the
wrong decision, but we have 40 years more data to work on.

And has already been pointed out, cross-platform interchange at Oxford
Circus with the Bakerloo means passengers for Charing Cross,
Embankment and Waterloo can use that line to get to those destinations
(though of course the Bakerloo station at Charing X is really
underneath Trafalgar Square and is thus a short subterranean trek away
from the mainline station).

Warren Street (Vic) is very close to Goodge Street (Northern) - so
most passengers can quite reasonably use that station instead. Which
leaves Tottenham Court Road as the only central area destination with
a more awkward interchange at Euston or Warren Street.

Going south, for any destination from Stockwell southwards passengers
should stay on the Victoria line, so that leaves Kennington and Oval
as the only other two destinations where one must make a more awkward
change.

Of course a fundamental issue is that the Oxford Circus cross-platform
goodness isn't at all apparent on the Tube map.