iHeartMedia Billboards to Track People Through Phones

New York Times: Clear Channel Outdoor Americas, which has tens of thousands of billboards across the United States, will announce on Monday that it has partnered with several companies, including AT&T, to track people’s travel patterns and behaviors through their mobile phones. By aggregating the trove of data from these companies, Clear Channel Outdoor hopes to provide advertisers with detailed information about the people who pass its billboards to help them plan more effective, targeted campaigns.