> Once a card has been used, it can't be used again for 18 minutes
I'm not sure what you mean. I've used mine twice in quick succession to pay for a friend.
I'm not sure what you mean. I've used mine twice in quick succession to pay for a friend.
If you swipe into station A, realise you got into the wrong entrance, you can usually just walk to the 24-hour booth and ask them to let you in the gate.
Also you can walk to another station.