Transportation Defined

Passive Acoustic Device
You've probably never gotten a good look at the Passive Acoustic Devices (PAD) out on the freeways … they're easy to miss. PADs are small objects that sit near the top of utility poles and are barely visible to drivers below, but they collect a lot of useful data.
CCTV cameras
Maybe you've noticed some of the cameras that are perched high above the roadways ... These are Closed Circuit Television (CCTV) cameras and are used by ADOT's Traffic Operations Center (TOC) to constantly monitor traffic conditions throughout the state.
Controller Cabinet
Have you ever spotted something on the highway and wondered, ‘what is that and why is it there?’ If you have, the ADOT Blog is here to help you find the answer!

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