The the idea of allowingrncommuters to tap their con-rntactless credit or debit cardsrnto board subway trains orrnbuses continues to make the rounds.rnBut the concept hasn't yet pulled out ofrnthe station.rnBanks and transit agencies would have to settle a number of issues before the same contactless banking application a cardholder used to buy a sandwich or cup of coffee could get him onto the metro.
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