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

a specific device, its shape, position, and nearby equipment can offer useful clues.

A photo taken safely from a stationary location may also help you compare it with known traffic equipment. Never stop in an unsafe place or use your phone while driving to take a picture.

Frequently Asked Questions
What is the small white box on a traffic light pole?
It may be a vehicle detection sensor, radar unit, infrared detector, camera enclosure, communication device, or another piece of traffic equipment. The exact purpose depends on its design and location.

Does the white device detect my car?
It might.