I will smash eet.

From left to right, top to bottom: 2 fixed box cameras (most likely 2 generations of ALPRs: an older (larger/yellowed: which they won't bother removing, and instead keep for redundancy), and a newer (more capable) model), a 'Pan Tilt Zoom (PTZ)', and what appears to be a radar sensor (for detecting objects: possibly serving as a redundancy, during challenging weather conditions). I suspect the radar sensor got installed first (just for perimeter intrusion detection), they added the old ALPR next (to detect patterns in registered license plates); and the rest as an upgrade (including an increased field of view: through the PTZ's movable head).

The photo has at least three separate surveillance systems that don't talk to each other — but can be correlated after the fact.

The cameras are almost certainly FLOCK Safety LPR units. OCR every plate, real-time hot list alerts, data retained and licensed to law enforcement. deflock.org (already linked) maps the known network.

The white brick is a radar vehicle presence detector for traffic signal control — it replaced inductive loops cut into asphalt. Pure object detection, no identity data, not part of any surveillance network. SARGE had this right.

The layer nobody's mentioned: if you're carrying an EZPass or any RFID toll transponder, it broadcasts a unique ID to any reader in range — including private ones. The ACLU documented this years ago (bitteroldcoot's link). Your transponder doesn't know it's not a toll plaza.

Three separate data streams. The surveillance picture isn't one device — it's three systems that can be joined on timestamp and location after the fact by anyone with access to any one of them. The white brick is genuinely just traffic engineering. The other two aren't.

Dunno if you’re in America but here’s a site with a map of known flock cameras if you want to check if that one is part of the network

https://deflock.org/

I have no proof, but I suspect some of them will identify your car by your ezpass.
(a brief pause)
Did a search, and yup. You're carrying a tracking device, of course they are going to use it to track you

https://www.aclu.org/news/privacy-technology/newly-obtained-records-reveal-extensive-monitoring-e-zpass

The white brick at the bottom is for detecting large objects (cars) and is either controlling a traffic signal, or is being used to count traffic going through that spot.

An intersection near me uses them to switch the lights at an intersection where traffic almost never comes from, so a timed light is unnecessary, but important traffic still comes from that direction.

Another similar device:

Road guy Rob has a video that came out yesterday and in it they discuss the bottom one being a radar alternative for loops in the ground for cars to change the lights.

I work for a company that makes security cameras and we also make radars as a supplement to the cameras. The purpose of the radar is to tell PTZ cameras where objects are so they can pan/rotate to the correct spot as quickly as possible.

In this case these look like fixed cameras so I don’t think it’s a radar.

I would assume, considering the climate these cameras are in that this is some kind of weather sensor.

Considering the size of it, it probably has a few features to it.

A quick search for "traffic sensor" returns a whole class of items that all basically look like the rectangular brick in your photo. Supported by the temporary / construction look of the one in the other comment.

Construction company puts in a lane restriction or other traffic modification, plop down a traffic sensor to make sure cars are still flowing through properly.

Looks cold, a thermite module would help.

Btw, the white box in a supermarket ceiling is to ID you and track your movement based on your phone.