On Fri, 18 Jun 2004, PRAR wrote:

On Thu, 17 Jun 2004 21:45:01 +0100, Tom Anderson
wrote:

Here's a worked example, where someone who lives in the inner suburbs goes
to work in town and goes out somewhere central for lunch. We track the
amount spent (in pence) in zone 6/5/4/3/2/1/buses after each trip. We
start with no spending and no travelcard. This all happens before off-peak
TCs are available (it's a very early lunch). I assume pre-pay prices for
everything.

Start: 0/0/0/0/0/0/0
Catch a bus to the tube station, in Z3: 0/0/0/0/0/0/70; charge 70
Get a train to Z1: 0/0/0/230/0/0/70; charge 230

Isn't it the zone 1 gate which applies this charge?

AIUI, the charge is effectively applied by the gate at the end of the
journey; what actually happens that the gate at the start takes off the
maximum amount you could possibly spend on a journey from that station,
then the gate at the end works out what it actually cost and refund the
difference. Unless you looked at the card during the journey, you'd never
know, though. Unresolved journeys are handled, er, somehow.

tom

--
For one thing at least is almost certain about the future, namely, that very much of it will be such as we should call incredible. -- Olaf Stapledon