In which decade did systematic commercial advertising first appear inside public transportation vehicles in the United States, revolutionizing how brands reached commuting consumers?

The transportation industry has long been a platform for innovative advertising. From subway cars to buses and taxis, brands have found creative ways to capture the attention of commuters. This poll tests your knowledge about a pivotal moment in transportation advertising history that changed how brands connect with consumers on the move. Can you identify when and how this significant shift in advertising strategy began?

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

1890s, when New York's elevated railways sold space for printed cards above windows
1920s, when Chicago's trolley cars began featuring changeable illuminated advertisements
1950s, when post-war bus systems introduced the first audio advertisements during rides
1970s, when San Francisco's BART system pioneered digital advertising screens in train cars