In the words of James May "Oh Cock" I always forget a speed camera on the way to my folks so best beware
During LM it's more the random ones where they hide behind a bridge or in some bushes that are the problem as they'll take your beer money off of you at best, or your car at worst!
Aye to that - got nabbed once by Les Flics on the autoroute between Rouen and Neufchatel. Blokes in camo gear hiding in the bushes by a bridge with a speed gun - I had forgotten they would be there on the Monday after the race. Motorbikes caught up and pulled me over at the next junction. Numbers of others sat there waiting to be processed.
Amiably chatted in French to my copper as we waited, while others used the well known Brit technique of talking ever louder to Johnny Foreigner in English. Others were getting spanked with the €750 fine or the highest buggeration of the €1000 + confiscation of car. My copper walked to the control van (while I thought lots of "oh sh*t" thoughts. He got the ticket and wrote on it while walking back and presented it to me. His amendment had reduced the speed measured to be just inside the lowest category (€90 IIRC) of speeding infringement (when I had clearly been doing rather more).
On looking at him quizzically, he gave me a smile and a gallic shrug, and said "speedometer error". Bless him - €90 was easy to deal with - €750 would have been a tad tricky to hide from CinC Home Command......
MG Mark