Those white cameras mounted above traffic lights serve a little-known purpose

Many people are up in arms over Flock and similar cameras that can track you when you drive. But these cameras are there for a whole different reason.

Many people are up in arms over Flock and similar cameras that can track you when you drive. But these cameras are there for a whole different reason.<p><img src="https://www.engadget.com/img/gallery/those-white-cameras-mounted-above-traffic-lights-serve-a-little-known-purpose/intro-1793912020.jpg" /></p>