Mizter T wrote:

I think it's fair enough for the system designers to assume that with
this example the route taken would be via zone 1 on the Central Line. I
guess if you did want to go via Rayner's Lane then you can ensure you
don't pay for zone 1 by exiting and re-entering the station via the
gates - thus ensuring the system knows what you're doing.

Actually I think that might cause problems as well. I've done this
(admittedly within my season ticket zones) when I was feeling a bit
grotty on one of the trains and decided to get some fresh air. So I
existed a station for about one or two minutes and then tried to
re-enter. This caused an error message and when I went to the gateline
staff they told me it was because I had just left.

I suppose that makes sense as exiting and then re-entering immediately
is rather odd behaviour and may indicate someone passing their card to
someone else.

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David Howdon wrote:
Mizter T wrote:

I think it's fair enough for the system designers to assume that with
this example the route taken would be via zone 1 on the Central Line. I
guess if you did want to go via Rayner's Lane then you can ensure you
don't pay for zone 1 by exiting and re-entering the station via the
gates - thus ensuring the system knows what you're doing.

Actually I think that might cause problems as well. I've done this
(admittedly within my season ticket zones) when I was feeling a bit
grotty on one of the trains and decided to get some fresh air. So I
existed a station for about one or two minutes and then tried to
re-enter. This caused an error message and when I went to the gateline
staff they told me it was because I had just left.

I suppose that makes sense as exiting and then re-entering immediately
is rather odd behaviour and may indicate someone passing their card to
someone else.


Now you say it that issue does sound familiar, I think I've encountered
that.

In terms of exiting and re-rentering being a pain in the arse and you
as the passenger getting funny looks then that is a problem - you just
need to be let back in through the manual gates with the staff querying
your card using a handheld reader (if they can be bothered - or they
could always use a Oyster ticket machine to check your Oyster, I've
seen Tube staff do this). However it wouldn't be a problem in terms of
messing up your journey on the Oyster system. As this previous poster
explains [1]...

"Oyster can cope with an entry followed by two exits, as it just
extends the journey. However two entries followed by one exit will lead
to an unresolved journey."

....so you can go in (once), out (once), be let back in through the
manual gates and out (a second time). Being let back in at the gates
wouldn't count on your Oyster card.


[1] Link to Google Group archive of message:
http://tinyurl.com/pnybd

On 29 Jun 2006 15:46:07 -0700, Mizter T wrote:

"Oyster can cope with an entry followed by two exits, as it just
extends the journey. However two entries followed by one exit will lead
to an unresolved journey."

...so you can go in (once), out (once), be let back in through the
manual gates and out (a second time). Being let back in at the gates
wouldn't count on your Oyster card.

Interesting. Does this apply to all exits, even ones at the barriers
on the way out of a station, where you can't just be changing to
another line? I'd have expected you to end up with a complete journey,
followed by an unresolved (unstarted) journey.

The other kind of validator is ones like the platform ones at Ealing
Broadway, where you might be ending your journey (transferring to NR)
or you might not be (either changing between District and Central, or
on your way to the station exit where there are barriers). AFAIK these
ones definitely work as you describe.

On Thu, 29 Jun 2006 22:06:36 GMT, David Howdon
wrote:

I think it's fair enough for the system designers to assume that with
this example the route taken would be via zone 1 on the Central Line. I
guess if you did want to go via Rayner's Lane then you can ensure you
don't pay for zone 1 by exiting and re-entering the station via the
gates - thus ensuring the system knows what you're doing.

Actually I think that might cause problems as well. I've done this
(admittedly within my season ticket zones) when I was feeling a bit
grotty on one of the trains and decided to get some fresh air. So I
existed a station for about one or two minutes and then tried to
re-enter. This caused an error message and when I went to the gateline
staff they told me it was because I had just left.

I'm sure I did something similar to this a few months ago when I
arrived at a station by Tube, met a friend in the ticket hall, then we
immediately went back into the Tube. Can't remember whether I was
using pre-pay or a Travelcard, but the gates had no problem with me
exiting then entering again a very short time later.

I suppose that makes sense as exiting and then re-entering immediately
is rather odd behaviour and may indicate someone passing their card to
someone else.

Unlikely - that would generally involve an entry followed by another
entry, or an exit followed by another exit.

"David Howdon" wrote in
message

Actually I think that might cause problems as well. I've done this
(admittedly within my season ticket zones) when I was feeling a bit
grotty on one of the trains and decided to get some fresh air. So I
existed a station for about one or two minutes and then tried to
re-enter. This caused an error message and when I went to the gateline
staff they told me it was because I had just left.

This is just the passback time-out. It is, as you suggest,
to prevent people passing their card/ticket back to someone else
behind them. Hence the name. I've often exited station gate lines to
get some junk food and re-entered 90s later. The staff are well
accustomed to pass back time problems and I've never had any trouble
getting them to let me back in.

Richard [in SG19]



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