Paul Corfield wrote:
On Thu, 30 Nov 2006 21:16:59 GMT, Olof Lagerkvist
wrote:

But I have noticed another interesting thing about the via-or-not-via
zone 1 question. If I travel from Tottenham Hale to Canada Water by
tube, it charges zone 3-1. Okay. But if I continue to Canary Wharf I
will pay less because it then charges a zone 3-2 only. Then one wonder
how it would be possible to touch in on the tube network at T. Hale and
out at Canary Wharf without going through zone 1...

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

I've not investigated the north side of Stratford Station - are there
validators on or near the "one" platforms for trains to Tottenham Hale
(and north thereof)?

If so, a very interesting set of logic at work there.

My current understanding is that there is a fixed fare for every
origin-destination pair, based on the most likely route used - and that
"revalidations" make no difference to this. For example, I believe that
for Hammersmith (District) to Harrow-on-the-Hill would be charged as a
non-Z1 journey, even if you went via Marylebone (exiting the LU gates
and entering the Chiltern gates).

The Single Fare Finder is a public front-end to this fixed-fare database.
http://www.tfl.gov.uk/tfl/fares-tickets/fare-finder/

The fares seem to make assumptions in the favour of the passenger where
the choice between Z1 and non-Z1 routes is ambiguous. For example,
Hammersmith (D) to Dollis Hill is a non-Z1 fare, despite being faster
and involving less changes via Green Park than via Rayners Lane.

--
Dave Arquati
www.alwaystouchout.com - Transport projects in London