In message , at 15:20:47 on Thu, 26
Jun 2014, tim..... remarked:
It certainly seems reasonable that the reader should be "intelligent"
and look for:

Freedom pass
Oyster with relevant season
Oyster with PAYG balance

before randomly selecting debiting your CC

Even if it can't (for whatever technical reason TfL can think of)
actually intelligently charge the correct card from the above list ,
it should certainly decide not to charge the CC if one of the others
is found.

It can't, and doesn't,

I know that it doesn't (that's almost a given)

but I don't see that it can't.

do all that in the short interval it has available.

So extending that window is a worse use of time that having pax stand
at the barrier for 30 seconds whilst he fusses about which card to use?

The speed of operating gates has always been fundamental for TfL, even
though I believe they've had to sacrifice a little to accommodate
contactless CCs at all.
--
Roland Perry