What’s the Purpose of That Little White Device on the Traffic Light Pole?

may detect activity automatically, while the other requires someone to press it.

6. Communication Equipment

Not every device on a traffic light pole detects vehicles.

Some small enclosures contain communication equipment that allows traffic signals to exchange information with nearby systems or a transportation management center.

This equipment may support:

Communication between traffic signal controllers

Remote monitoring of intersections

Traffic management networks

Connected vehicle infrastructure

Equipment diagnostics and maintenance

These devices may look like simple white boxes, but they can be important parts of a larger traffic technology network.

How Do Traffic Detection Sensors Actually Work?
The exact process depends on