"Roland Perry" wrote in message
...
In message , at 12:31:41 on
Sat, 7 May 2011, Paul Corfield remarked:

[1] except at Hong Kong International Airport. The Airport Line has
premium fares so it is separately gated off from all other lines.

Madrid metro has a premium fare to the airport (but not stations earlier
or later on the same line). I assume they enforce this with exit barriers,
I forget.

They do.

It's quite funny sitting watching the people with "normal" tickets try to
exit the station :-) (There are machines inside the barrier at which you
have to buy the "premium" airport ticket if you um, forgot, on entry.

tim