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That's unfortunate. There were definitely times when I lived in NYC (pre-Metrocard) when I took two rides within 18 minutes (take short ride, jump out of station for quick errand, come back in for next part of journey). Are you saying that would not be possible?

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Nope, that's only for the same station. Assuming you swipe into station A, exit station B, and swipe again at station B, you're fine.

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.

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