On our travels recently we have noticed grey boxes, not speed cameras, low level ones, in the hedgerows, what on earth are they for? My husband thinks its so the police can tracke where your car has been if its stolen. Help i would like to know!
Are you sure they are not the boxes that the postie collects part of there round in so they do nt have to carry it all the way. Otherwise they could be part of the average speed monitoring equipment to find traffic jams or to measure the temperature of the road and other weather conditions for ice warning.
Trackers that are activated when a car is stolen only tell you where a car is, not where it has been. The system uses satellite location the same as satnav not boxes by the side of the road.
Most common are traffic counters. They are usually about a 8" cube box on a 3-4' post. You will see loop detectors cut into the road at the same location. Equipment is not permanently in the box, but can easily be installed for short counting periods.
In the Norfolk rural area we have numbers of grey boxes which contain BT distribution wiring catenaries. They are usually on the footpath rather than road side.