What are those little cameras above traffic lights actually for?

While most traffic light cameras simply measure traffic and help time the lights, some modern additions are used for more sinister purposes.
Hosted on MSN

No, not all traffic lights have cameras - here's how to possibly identify those that do

While there are plenty of traffic laws out there that might have you scratching your head, there's a good reason why zooming through a red light is illegal. Whether on a busy city street or a small ...
SlashGear

Those Black Boxes Near Traffic Lights Aren't Cameras – Here's What They Really Do

You can find all kinds of things at an intersection in the modern era, from the ever-essential traffic light to various cameras. While it's not hard to figure out what a lot of these items are for, ...
Al Jazeera English

A brief history of the traffic light and why we need a new colour

The universally known traffic light has not experienced a significant redesign in almost 100 years, ever since William Pott, a Detroit police officer, created the first three-section traffic light in ...
SlashGear

The Ingenious Way Traffic Lights Worked Before Computers Were Invented

Today's traffic lights can be controlled by anything from standard traffic control computers to highly advanced AI-driven computer systems that are so "smart" they can predict what's going to happen ...
Reader's Digest

Here’s What It Means If You See a Blue Traffic Light

Show almost anyone in the world a red, yellow and green light, and they’ll instantly associate the colorful trio with a traffic signal. But add another color to the mix, and many will be left in the ...