Neil Williams wrote:
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.

But there's also the issue of the journey time limit, which is where the
problem can arise. For example, let's say journey 1 lasts 80 minutes (90
allowed), and the next journey, from the same station, starts 15 minutes
later (20 mins OSI allowed). The Oyster system will try and combine these
into a single journey, but the combined journey may well exceed the allowed
time, leading to two incomplete journeys.