Recliner wrote:

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.

A sensible solution for OSIs would be to add the time outside the system
while using an OSI to the maximum.

There is also no sense in allowing an OSI if you exit a station then
re-enter the same one, possibly except during disruption, because that's
either a break of journey or a return journey, not an out of system
interchange.

Neil
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Neil Williams in Milton Keynes, UK. Put first name before the at to reply.