One of the last things the current French president has been able to push through before becoming unemployed, is the installation of 150 average route trip radars.
Route trip radars consist of 2 sets of radars, one at the beginning of a road segment, the other at the end. When you arrive at the beginning of the segment on your motorcycle, the first radar makes a photo of your motorcycle license plate, recording the date & time. Then when you pass through the end part of the segment, another photo is made, and the average speed is calculated. If you have been speeding, and your average exceeds the maximum speed authorized, you'll get fined, and license points will be deducted.
The 150 segment radars will be installed between now and the end of 2014. When you enter such a radar check, most of them will be on the motorways, they will be signposted.
The segments can be quite long, typically 20 to 30 kilometers, as long as there are no exit points on that portion of the road.
Are we having fun yet?