Which innovative transit advertising technique first emerged in the 2010s, using passenger movement patterns to trigger dynamic content displays?

Transit advertising has dramatically transformed over the decades, evolving from simple signage to sophisticated digital experiences. As transportation companies seek to maximize revenue streams beyond ticket sales, advertising has become a critical component of their business model. This trivia question explores an innovative advertising technique that revolutionized how brands engage with commuters and travelers, creating new opportunities for targeted marketing in transit environments.

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Motion-activated digital panels that change content based on the speed and flow of passengers walking past them
QR code stations that allowed passengers to scan and receive personalized offers on their mobile devices
Temperature-responsive displays that altered messaging based on weather conditions at transit stations
Augmented reality transit maps that overlaid brand promotions when viewed through specialized kiosks