11 ms·
NYC metro cards are reportedly a form of stored-value card. When you swipe, it reads the value, writes the new value, and checks that the correct value was writ
by medler 3y ago
NYC metro cards are reportedly a form of stored-value card. When you swipe, it reads the value, writes the new value, and checks that the correct value was written. Transactions are later synced to a database to catch fraud and so forth. https://www.reddit.com/r/AskNYC/comments/nsicuj/technologically_how_does_a_metrocard_work/ https://www.reddit.com/r/AskNYC/comments/nsicuj/technologica...
- jcrawfordor 3y agoNYC MetroCard is yet another Cubic transit SVC system, and so the system is largely identical to other Cubic systems like Clipper, Oyster, etc. As a rule of thumb, most transit card systems in the US and Western Europe are Cubic, but there are plenty of exceptions.