"Neil Williams" wrote in message
...
wrote:

"Finished your journey? Touch the purple validator to ensure you
are charged the correct fare".

Or perhaps more logical one to signify that you are continuing it.

Even better, just close the journey if a touch-back-in doesn't occur
within
the OSI time period, if necessary the next time the card is used. Don't
see why that's hard.

Journeys terminating at an OSI are closed.

It's the default to reopening when you touch back in again (within the
allowed time) that allows the problem.

(and you then only end up with a wrong charge if the total journey time is
more that allowed - but that's much more likely to happen if the second leg
isn't really a second leg at all)

tim