Which transportation advertising innovation first allowed real-time, location-based ad targeting on public transit vehicles?

Public transportation has become a powerful advertising channel in modern cities. From traditional static posters to interactive digital displays, transit advertising has evolved dramatically over the past decade. This trivia question explores a groundbreaking innovation in transportation advertising technology that changed how brands connect with commuters on the move. Test your knowledge of this transportation marketing revolution!

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Beacon-enabled digital displays that change advertisements based on neighborhood demographics and time of day
QR code posters that unlock special offers when scanned by passengers
Augmented reality bus shelter displays that personalize ads based on viewer appearance
NFC-enabled seat backs that push notifications to nearby smartphones