What is this? It flashes every time an ambulance speeds by. They are all over my city

It’s a traffic control system designed to give emergency vehicles the green light — literally. That device is called an Opticom™, made by Global Traffic Technologies (GTT).

Here’s how it works:

  • Emergency vehicles are equipped with an emitter, which sends out a visible or infrared strobe signal.

  • Traffic intersections have an Opticom receiver, mounted near the traffic lights.

  • When the receiver …

    CONTINUE READING ON THE NEXT PAGE

    👇 👇 👇 👇 👇