"Neil Williams" wrote in message

On Sat, 30 Jan 2010 16:51:11 +0000, Graham Murray
wrote:

So would it not make more sense to only combine them if the combined
journey is within the time limit for the overall journey and keep
them as separate journeys[1] if the combined journey would be over
the time limit. Also, always treat it as 2 separate journeys rather
than combining them where someone touches in at A, touches out at B,
then later touches in again at B travels to A and touches out.

This would certainly make sense to me - and surely from TfL's side?
Unresolved journeys (when people notice them) cost TfL money because
they have to be corrected manually. They also cost goodwill when they
aren't noticed but the dropping balance is.

Or can't the card do that?

The card probably can't do something as sensible and clever as that, but
one would assume that a daily batch process on the central servers could
correct such anomalies.

But that would presumably require a lot more processing than is
currently built into the current operation, and would make the system
more complex and expensive to run. And explaining the algorithms would
become even harder than it already is.