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Road/driving tracking devices
(lemmy.ml)
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this post was submitted on 22 Feb 2026
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Privacy
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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.