The 90km/h speed limit signs on downhill stretches of French motorways apply to those outfits under 3.5 tonnes which are otherwise not restricted to 90km/h.
Blowouts are not an issue because virtually all caravans have tyres with at least an 'N' rating (up to 140km/h).
Much of the confusion regarding the need for stickers would have been avoided if those that published the information would have disclosed the source.
The issue regarding speed limits it not new (refer to a similar thread which started in June last year in the Touring and Tenting Forum:
http://www.touringandtenting.com/forums/index.php?/topic/34976-french-speed-limits/)
re whether this is a new law or not I quote from the Caravan Club sites guide Caravan Europe 1, 2007.
in the France section Speed Limits - Outside Built-up Areas it says:-
" General speed limits are as follows:
- On normal roads 90 km/h (56 mph)
- On dual carriageways separated by a central reservation
110 km/h (68mph)
- On motorways 130 km/h (81 mph)
These limits also apply to private cars towing a trailer or caravan, provided the total weight does nor exceed 3,500 kg. Vehicles over 3,500 kg are classed as goods vehicles and the speed limit on motorways is 110 km/h (68 mph) while on dual carriageways it is 80 - 100 km/h (50 - 60 mph) and on other roads 80 km/h (50 mph)."
So, according to that , at that time, even over 3.5t I was able to tow at 110 km/h on the motorway. Has there been any change since then?
g