On Mon, 25 Jan 2010 05:37:26 -0800 (PST)
MIG wrote:
Presumably they think people would attempt to combine two longish,
separate journeys, which were separated by a lengthy interval, into one
short (cheap) journey (ie, by not touching in/out at the intermediate
station).

That's the justification for the timeout existing at all, which seems
fair enough if you haven't touched anywhere.

Well if you don't touch anywhere it can't apply any charge.

It seems to me its a way of fixing the ****up they've created by having
validators that are both touch in and touch out at the same time so the
system can't tell if you're finishing a very delayed first journey or
starting a 2nd journey but forgot to touch out on the 1st. If they had
seperate validators for in and out like they do with the gates then it
wouldn't be an issue. But to save themselves a bit of cash they decided to
stiff the public instead.

B2003