On 14 Mar, 11:25, David Cantrell wrote:
On Fri, Mar 14, 2008 at 12:11:09AM +0000, Steve M wrote:
Fair enough, but those are the official 2006 figures (which now seem to
be available to the public on the TfL website).

Measured how? *By tickets sold at that station? *Barrier entries/exits?
Both those will be too low - the latter especially, because at least
when I've gone there for an exhibition they've just opened the gates and
let everyone flood in and out unimpeded.

--
David Cantrell |http://www.cantrell.org.uk/david

* Languages for which ISO-Latin-$n is not necessary, #1 in a series:

* * Latin

When I am sent to a station to count passengers, the normal process is
to count the numbers Joining and Alighting (and sometimes On Train
Departure) train by train. If these are the figures used then they
could, in a few cases overstate exits and entries as anyone
interchanging would be counted even though they don't actually leave
the station. In some cases, at London Bridge for example, we sometimes
count transfers between Eastern and Central, or at other locations we
have done specific barrier counts, usually in 5 or 15 minute bands for
the purposes of calculating passenger flows.

Clearly a fully gated station should give you an ongoing idea of
passenger numbes which "manual" checks should confirm. Even at fully
barrier controlled stations, however, a lot of people with strange/non
functioning tickets and special passes will be let through the gate by
staff. Hence the need for a physical count from time to time.

It should be pointed out that this is not an exact science - counting
bobbing heads (or feet and dividing by 2) is not as easy as it might
seem; but we do our best!

MaxB