In message , at 18:20:52 on
Mon, 26 Jan 2009, Paul Scott remarked:
Yes, I'm pretty sure that's the one which said the flows would be clogged
up by people not wanting to step out into the rain.

Yes, thats about right, anyway I've found the flow diagrams again now, they
are in 'Station Design and Passenger Movements', one of the LB Camden
drawings Mizter T has just linked to at :

http://tinyurl.com/cth9rq

Oh yus. It's all deliberate. It's to "animate the square" and "avoid
conflicting flows" into the new western concourse. And...

"From detailed studies at Warren Street tube station, where a similar
situation exists with the gate line close to the station boundary, it
has been observed that passengers tend to slow down after the
gates during wet weather often stopping totally to button clothing, lift
hoods to cover their heads, or to raise umbrellas. This results in a
very obvious reduction in passenger flow and it has been observed to
cause tail backs and reduce the capacity of gate lines."

So they've bodged a canopy on the front of the building to (pardon my
French): "give passengers the opportunity to make public realm route
decisions external to the operational areas of the station in all
weather conditions".

Well, folks, my "public realm route decision" is to ask Arup to roll up
these plans and use them as a suppository!!

IIRC it won't be the primary route for anything, it just seems to be a
second access route to the platforms for pax who have been using the
catering facilities at first floor level...

Are those first floor facilities airside or landside? Just interested to
know how the gatelines and the bridge inter-react.

There is a small gateline just where the bridge passes through the west side
office range, which is marked up as Overbridge Entry, and coloured for
'arrivals into station' (remember we worked out the drawing uses arrivals
and departures 'on foot' rather than by train!) so inside the train shed the
bridge and escalators are 'paid side'.

Just to add to the confusion there is a two way gateline in the same place
but at ground level, between the western ticket hall and train shed marked
as 'Platform 8 link'.

So if you go "up" in one of the lifts to the bridge, all you can do is
go "down" to another platform?

--
Roland Perry