What is that black box?

[buzzsaw]

Approaching a telegraph pole a couple of days ago and my radar detector starting going mental. I looked around for the source and the only thing unusual I could see was a black, rectangular box, approx 50cm x 25cm strapped to the telegraph pole. No gatsos or traffic lights around. This now happens every time I pass the telegraph pole. Any body have a clue what this thing might be?

[abz 7001]

Like all black boxes it collects data. At a guess its measuring one of the following 2 things:

average speed of vehicles (would need two strips I believe)
volume of traffic throughout day
normally a precursor to some sort of traffic calming measure, safety initiative or speed trap - probably calculating how much can be made from that stretch of road no doubt. Just a guess from what i have picked up whilst on the road and this forum. Am sure someone will be along shortly with the model number manufacturer etc

[cptsideways]

It's probably a BT microwave link, its cheaper than sticking up new poles & miles of cables. I've got one near my house and my detector goes mad at it too.

[stuuu]

It sounds like the boxes they have on those flashing slow down signs. The temp signs fold down when not in use, but I have passed a few that still omit K band.
Never seen one attached to a lamp post but I have seen one attached to a permanent sign, looks like a motorway information sign thingy.

Stu