Looks like that one's partially obscured by the street-light pole behind it in the pic, aswell......typical location, devised by another revenue-generating bunch of thieves!

Also, if my geometry from school is right, putting the camera vertically further away from the horizontal travel of the vehicle means it's less accurate, as it has to take into account the "angle-of-attack" at each photo-point (ie. if the car is right below it, the angle between the travel direction of the car and the direction of the camera-lens is going to be almost 90-degrees; but if the car is 6 metres away, the angle will be 45-degrees; if the car is a long distance away, it will be close to 0-degrees - the closer to the ground, the more accurate the camera in calculating the speed, unless the cameras are calibrated to already take the height of the camera and distance from the line of travel of the car)?