On Thu, 1 Jan 2004 11:45:19 -0000, "John Rowland"
wrote:

"Paul Corfield" wrote in message
.. .

With a validator equipped station Travelcard holders
who are "in zone" don't have to swipe their Oyster
card but if you are out of zone you do for the
purposes of calculation of auto ticket extensions.

I see no way that LU can prevent fraud. You can travel anywhere you like on
the system with a one-zone travelcard, and then when you get to your
destination, if the gates are active, you swipe and have your extension
deducted... if the gates are inactive, you just walk out and you have no way
of getting caught. If any RCI stops you en route out of your travelcard
zone, you just say you are going to swipe for the extension at your
journey's end.

there are other ways of knowing how a card is (mis)used. Be sure that
the ability to detect fraud will get better not worse. Open (ungated)
entry and exit points are not a good way to design a stored value system
but the scheme is unaffordable if it has to carry the cost of gating and
manning every single entry / exit point to the LUL system. Also how on
earth do you deal with segregating people e.g. between Richmond and
Gunnersbury, where there is inter-operation?

It's a compromise design - there are risks but they have to be
controlled.
--
Paul C


Admits to working for London Underground!