Just back from a week in France and didn't change my riding style or speed regardlessof the new limits. All the years I've been going and still haven't met a Gendarme. Long may it last.
In case you ride un France these days (for those who are allowed) , perhaps difficult to understand what is the max speed on the road you are. French departments have now their own choice: to stay with
80 Kms/h on main roads or to come back (as in 2018) to
90 Kms/h . So the same road changing department is 80/90 or 90/80
. Nice to ride with updated satnav maps, or with some app as Waze ...
Ride safe