Which mobile payment technology was first implemented by a major transportation network to allow riders to pay by simply tapping their smartphones against a reader?

The transportation industry has transformed how retailers engage with consumers on-the-go. From airports to train stations, mobile commerce has created unique opportunities for brands to connect with travelers. This poll tests your knowledge about an innovative retail payment system that revolutionized transportation commerce and changed how consumers interact with transportation services.

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Near Field Communication (NFC) by Transport for London in 2014
QR Code Scanning by Tokyo Metro in 2010
Bluetooth Low Energy (BLE) by New York MTA in 2016
Facial Recognition by Singapore MRT in 2012