Wouldn't the most likely reason to "Swipe again" be that the read failed? | Hacker News

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		bosdev on Aug 28, 2015 \| parent \| context \| favorite \| on: New York City's MTA Exposed (2005) [pdf] Wouldn't the most likely reason to "Swipe again" be that the read failed?

gcr on Aug 29, 2015 [–]

The display sometimes reads "Swipe Again At This Turnstile," which might imply that data corruption would occur if you swiped elsewhere...

ceras on Aug 29, 2015 | [–]

I once saw that when using a pay-per-ride metrocard and swiped at a different turnstile. I ended up having two rides deducted instead of just one, so I lost a swipe.

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