Camera Case Blue

Camera Case Blue
The UK bridges m'way've seen what look like small cameras in a case of blue or green. What are

In general, seem to be pointing toward the center lane of the motorway from a bridge, sometimes there are two (one on the inside lane and one on the middle lane). There are similar elements "Chambers" (if that is what they are, do not look like normal CCTV cameras) on the side of the road in blue posts, usually with two cameras mounted on the superior. Are the cameras? If so, what are being used for? Some people think they are TrafficMaster and some think they are the disk control taxes. Anyone know for sure?

They are used by the system to measure how busy TrafficMaster is a defeat. When someone pops their navigation path satellite in a similar system or other traffic using the teacher can say the best route based on how well traffic moves in certain areas, ie if a traffic is moving slower than the speed limit will recommend a route that avoids that if it is faster to do so. They are deffinately cctv and are not used to check the holograms on tax discs.

Neko Case “Blue Blue Baby” (?) – new song! (The Pharoahs)