Shutter Direction
When the camera icon is selected in the Map Editor, the red dot should point in the direction of travel a car will pass the camera. It does not matter if the real-life camera will take a picture of the front of the offending vehicle.
For example, if a road runs east-west and the east bound lanes are monitored for speed, the red dot should point eastward of the camera icon in the Map Editor. Be sure the angle of the red dot also matches the angle of the flow of monitored traffic.