The cameras, which combine number plate reading technology with a global positioning satellite receiver, are similar to those used in roadworks.

The AA said it believed the new system could cover a network of streets as opposed to a straight line, and was “probably geared up to zones in residential areas.”

The Home Office is testing the cameras at two sites, one in Southwark, London, and the other A374 between Antony and Torpoint in Cornwall.

The `SpeedSpike’ system, which calculates average speed between any two points in the network, has been developed by PIPS Technology Ltd, an American-owned company with a base in Hampshire.

via New speed cameras trap motorists from space – Telegraph.

It’s unbelievable the amount of money it must cost to design and launch this system. The revenue must be huge, because the problem they’re designed to solve (speeding) doesn’t lead to many deaths or accidents.