The use of camera is confirmed.http://www.automotoconso.com/leblog/?p=1189
Many countries already use this kind of radar (cam) :
Belgium, UK, Italy and deutchland
In France the first system installed today can be used from 150 meters to many kilometers.
This is MESTA 5000 Smart. It is not already homologate but it will be in august. Up to this date, it works only for tests.http://www.radars-auto.com/info-radars/ ... -smart.php
The MESTA 5000 SMART can store and analyse up to 2400 vehicules for each line and per hour (so it is confirmed too that one cam is used by line on each side).
When you exceed average speed, a picture of your car is taken.
50 similar systems will be installed in France before the end of 2012.