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

send information between traffic signals and traffic management centers.

Not every intersection uses all these features. The equipment depends on the road design, traffic volume, local regulations, and the technology installed by the transportation authority.

The Most Common Types of Small White Devices on Traffic Lights
This is where things get interesting. Several different devices can look like small white boxes or compact sensors when viewed from the road.

Here are the most common possibilities.

1. Vehicle Detection Sensors

2. One possibility is a vehicle detection sensor.

   These devices help the traffic signal system determine whether vehicles are waiting at or approaching