They might be conducting surveillance on you or someone around you. In Florida the police use remote mounted cameras in boxes usually on utility poles to spy on drug and theft suspects. The cameras don't come in a certain configuration, there are at least a few models.
To sum it up the police mounted a camera on a utility pole across from a hydroponics gardening store in order to record people and license plates.....
Edit-After re-reading the post maybe it is to watch drug traffic come down the street?