Warning signs went a couple of years ago in QLD. Now they even have the rear of the camera vehicle unmarked and park in the emergency lane with their hazard lights flashing, to look like a regular stopped vehicle. It's only when you go past you might glimpse the stickers on the side. So now you have people braking (from legal speeds) for every stopped vehicle. I know they shouldn't need to, since they are all doing the right speed, but many people feel you need to go past speed cameras (fixed and mobile) at least 10kph under the limit.
