Which contactless payment system was first implemented in a major public transportation network, revolutionizing how commuters pay for travel?

The transportation industry has undergone significant transformation in how passengers pay for their journeys. Modern payment systems have revolutionized the customer experience, particularly in high-speed rail networks around the world. Test your knowledge about a groundbreaking payment innovation that changed how millions of travelers interact with transportation services daily. Can you identify which pioneering system led the way?

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London's Oyster card system (2003)
Hong Kong's Octopus card system (1997)
Tokyo's Suica card system (2001)
Paris's Navigo pass system (2001)