MILWAUKEE–(BUSINESS WIRE)–Clear Channel Outdoor (NYSE:CCO) today announced the successful conclusion of the Wisconsin Amber Alert test on six digital billboards serving the Milwaukee area. The boards are located on key freeway sites within the metropolitan area. The billboards are the newest addition to the Wisconsin Amber Alert System and were part of a state-wide test in recognition of National Missing Children ' s Day, according to a news release issued by Attorney General J.B. Van Hollen. "We could not be more excited about our ability to utilize our digital technology to provide this invaluable community service, which will be available to the Milwaukee market not only when a child is missing but also during a wide array of other community emergencies," said Paul Meyer, Global President of Clear Channel Outdoor. "This is in keeping with our policy to establish similar emergency messaging protocols in other cities where Clear Channel Outdoor has deployed digital networks."