On Mon, 15 Aug 2005 18:12:11 +0100, asdf
wrote:

...and so forth. Thus the system could have to be constantly
rearranging the combination of tickets you have owned for a
potentially unlimited time into the past.

I think we need to think outside the box on this, and a possibility
would be, once seasons are all on Oyster, to abandon the concept of
season tickets completely. You'd then define:-

1. One or more single fares, as few as feasible.
2. A daily rate, perhaps with a peak/offpeak differential.
3. A specific value of discount if, in any given 4-week period, 5 days
are capped at the daily rate (yes, including split weeks - why not!).
4. A specific value of additional discount if, in any given 4-week
period, 20 days are capped at the daily rate.
5. A specific value of additional discount if, in any given 12-month
period, N[1] 4-week discounts are given.

These are *almost* equivalent to a weekly, monthly or annual - but
much easier (though not simplicity itself) to implement.

Paper tickets are designed for issue on paper. We need a totally
different fares structure for Oyster.

[1] I can't be bothered working it out, but it would be the number of
workdays in a year minus a slightly above-average number of holidays.

Neil

--
Neil Williams in Milton Keynes, UK
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