In fact, according to Statista, outdoor advertising spend in North America amounted to almost 9 billion dollars and is expected to keep growing through 2024 to over 11 billion dollars. In a world where traditional advertising dollars keep diminishing, outdoor advertising is not only growing, its outpacing projections. Check out our top 5 Out-of-home marketing campaigns that delivered a real-world brand experience, with intelligent targeting and premium ROI data points.