The city has purchased mobile speed cameras that are now mounted on top of SUVs so they look like the SUVs that accompany over-sized vehicles. They park them (unmanned) in various business parking lots along the streets or on the shoulder of other streets. They are parked just after the speed limit changes. This is usually on streets/highways where there is a major change (35 to 20 or 45 to 35) and most of the time people don’t have enough time to slow down before the camera is triggered. I see people getting caught constantly by the cameras. In fact, it has gotten so bad that I have friends who don’t live in Gretna but always shopped and dined in the city who now refuse to spend any money within the city limits as a form of protest.