In message
, at
06:29:39 on Sat, 22 Nov 2008, Mr Thant
remarked:
You only need to make one totally pointless underground trip to enable
auto-top-up in the first place.

If you can predict where your next non-pointless trip is going to be,
use that to activate the top-up. But I have to admit that my own such
prediction proved to be wrong.
--
Roland Perry