Hard to say. That study you linked mentions reductions in speed and crashes in the vicinity of the camera, which to me indicates that people are only slowing down because they know a camera is there. I suppose someone would have to do a study to see if speed cameras reduce speeds and crashes in areas where there aren’t currently cameras, but have been in the past. Meaning that people are slowing down in areas where they think there might be cameras.
Hard to say. That study you linked mentions reductions in speed and crashes in the vicinity of the camera, which to me indicates that people are only slowing down because they know a camera is there. I suppose someone would have to do a study to see if speed cameras reduce speeds and crashes in areas where there aren’t currently cameras, but have been in the past. Meaning that people are slowing down in areas where they think there might be cameras.