In article , Richard M
Willis writes
That's the reason it's not being rolled-out so quickly onto NR: they
are waiting for OysterNextGen where the cards can be read at a distance of
several meters without a touch in/out and without the passenger knowing
they've been read. In this way, they can check for invalid routings if
wanted.

That's nonsense.

The power requirements to get back a readable signal from the card are
going to be enormous - it's something like inverse sixth power (I forget
why, but it was explained to me once).

And suppose you do that at a busy platform. How on earth is the system
going to discriminate between the 100 or so Oysters that respond?

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Clive D.W. Feather | Home:
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