What's Up With That? Overhead gadgets work traffic signals, don't photograph you

The ColumbianWhat's Up With That? Overhead gadgets work traffic signals, don't photograph youThe ColumbianBut the overall and (mostly) obvious explanation is that those gadgets, which are spreading around atop traffic signal poles all over the nation these days, are (mostly) cameras. Less obvious is that they do not record anything about you, your car or ...