On Jul 5, 3:15*pm, (Neil Williams)
wrote:

On 4 Jul 2009 23:13:36 GMT, "Michael R N Dolbear"
wrote:

As I have previously noted, putting the touch out devices outside at
bus stops rather than inside the bus doesn't require more advanced
anything. Thus in Tfl terms a surcharge would be added on entry, say on
all routes that go outside the zones. Boxes would be installed at all
bus stops on line of route which would refund the surcharge on touching
out if the stop is within the zones.

Though it might create an issue where people for whatever reason (e.g.
traffic conditions) end up leaving not at the stop.

Which I do quite frequently - and I've joined a bus a few times when
it hasn't been at the stop either. Plus there's hail and ride routes
to consider too.