Which major city's transit system was the first to implement a contactless payment card system that allowed passengers to 'tap and go' without purchasing separate tickets?

The transportation industry has revolutionized how passengers pay for their journeys over the years. From traditional cash payments to contactless methods, payment systems in transportation have undergone significant changes to enhance customer experience and operational efficiency. This poll tests your knowledge about a notable payment innovation in public transit that changed urban mobility forever.

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Hong Kong (Octopus card, 1997)
London (Oyster card, 2003)
Tokyo (Suica card, 2001)
Singapore (EZ-Link card, 2002)