I suspect this link will get a few visits
just done the trip to PQ this weekend (Calais to Le Mans via Rouen 3½ hours
) and spotted three fixed speed cameras...
these cameras are all facing you when heading south bound from Calais to Le Mans, there is a warning sign about each of these speed cameras but only a 100m or less before hand which does not give you much time to slow down
the first camera is located in the central reservation on the N38 which is the dual carraigeway after the motorway section from Abbeville approx 50m north of the Rouen tunnel before you get into Rouen
the second camera is located on the N138 from Rouen to Le Mans on the right hand verge as you come down the hill into Gace just north of the town
the third camera is located again on the right hand verge but on the ring road (N138R) heading around Le Mans before you get to the Champion supermarket
I am not too sure if you would actually receive a ticket from these cameras if you live in UK but that's up to you to find out