On Thu, 30 Nov 2006 22:06:01 GMT, Olof Lagerkvist wrote:

Okay, I can (and most times do) take the 'one' to Stratford and then DLR
from there, PAYG is valid on that route too, but in that case I have
found out that I have to validate at Stratford too because otherwise the
DLR validator at CW tell me it is an entry when I exit there so I don't
think that is the possible not-via-zone-1 route they are thinking about
here.

I assume you validate "in" at Tottenham Hale in your example?

Yes.

You then
validate "in" again at Stratford for DLR and then "out" at Canary Wharf?

Yes, but there is always a question about what is a correct "in" a
Stratford in this case. When I touch the DLR validator it seems to exit
the 'one' journey and enter a DLR journey correctly

UIVMM this is not how the PAYG system works. It's all one PAYG journey
and there is no concept of it being divided into separate 'one' and
DLR journeys.

and it works
correctly as an exit later at Canary Wharf. But if I do not validate at
all at Stratford, or only on the 'one' validator, it does not register
an exit but instead an entry at Wharf.

Regarding the latter case, perhaps the 'one' validator is set to
"entry or exit" rather than "entry, exit, or interchange" (I don't
know the official terms so I've made these ones up).

But I'm at a loss to explain why it happens when you don't touch at
Stratford at all.

Even the official TfL instructions state that you don't need to touch
a validator when interchanging, except at Bank:
http://www.tfl.gov.uk/dlr/tickets/oyster_faqs.shtml#9

When you say the DLR validator at Canary Wharf registers an entry, is
that according to your journey history, or just the LCD display by the
validator? Perhaps (I haven't checked) when the decision of a
validator's logic is "exit or interchange", it displays "enter" even
though you could actually be exiting.

Yes, I don't really get how it works. But it is clearly different from
the logic at Bank for example. But Stratford is not possible to compare
to anything else because there are no more places where it is possible
to change from NR PAYG to DLR PAYG (at least not any I can think of
now).

Canning Town, Limehouse