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Clear Channel Outdoor — one of the largest outdoor advertising companies in the U.S. — is starting a new program called Radar that will use billboards to map real-world habits and behaviors from nearby consumers. 美国最大的户外广告公司之一Clear Channel Outdoor正在开始一项名为Radar的新业务，通过广告牌探测经过路人的习惯和行为。 The technology is sure to help advertisers better target their ads. But privacy advocates argue that it's, well, a little creepy. 这项技术可以帮助广告商更好的定位其广告对象。但是隐私保护者认为这项技术太可怕了。 This is how Clear Channel Outdoor describes how the program works, in a video on its website:"Using anonymous aggregated data from consumer cellular and mobile devices, RADAR measures consumer's real-world travel patterns and behaviors as they move through their day, analyzing data on direction of travel, billboard viewability, and visits to specific destinations. This movement is then mapped against Clear Channel's displays, allowing advertisers to plan and buy Out-Of-Home to reach specific behavioral audience segments." 在Clear Channel Outdoor网站上的视频中有关于这项技术的描述：“通过使用电话网络和移动设备收集匿名数据，雷达测量路人的移动方式和一天中的活动行为，分析移动数据，广告牌路人可视度，特定目的地。这些数据会布局在Clear Channel的广告牌上，允许广告商计划和购买Out-Of-Home户外特定受众信息。” | 
