"Malcolm & Nika" wrote in message ...
So I went to Vauxhall and checked out what you said.
Sure enough there was a revenue exercise there yesterday.
You ask what it is that they can see that the gates dont?

They are solely checking for people who travel through zone 1 without a zone
1 ticket. This is marked on the ticket with the nice colour triangles...easy
to spot without actually reading the ticket. If it was bought north of the
river in a zone 3 to a zone 2 station it will have north colourings. It will
still let you out in a zone 2 station allowing you to travel through zone 1.
RPI sees the north colour triangles, checks it is valid in Z1....hey presto
if its only a £1 ticket....
Incidentally...they caught heaps.

So is the coding on a paper ticket not smart enough to establish that
a journey is made across zone 1. It seems pretty fundemental to me. If
you buy a zone 2 ticket at say Chalk Farm then travel to Vauxhall then
you must have crossed zone 1. The gates have only been around for
about 15 years, couldn't that check have been part of the programme or
am I missing something here. Do the gates only check the validity of
the date and that the exit zone matches the zone on the ticket.

Kevin