We live in France and although I have a BB I have never sought out the concession that Gaspode correctly explains. The "special adaptations" mentioned has been mentioned elsewhere but I do not know of one person who has been asked to confirm such modifications.
The parking concessions used (and sadly abused) in the UK, do not apply in the same way in France as the restrictions are much less onerous - there are few yellow lines prohibiting parking EXCEPT near junctions, where the yellow kerb painting indicates a total prohibition of parking - and there are no exceptions (unless you happen to be a French driver who fails to see such things and is only going to be there for a short while - say 6 hours+).
The one time when a BB is used is that there are a large number of spaces labelled specifically for use by BB holder displaying the blue wheelchair symbol as well as initials indicating war disabilities and other disabilities. There are rarely any concessions in car parks IMO, except sometimes at airports. Generally they simply give you closer access to doors. Most shops with a car park have at least one space just outside the door - but of course these are rarely suitable for MH.......
On autoroutes, there are labelled spaces either side of entrance doors to the facilities and good facilities normally inside. On the autoroute you can also request assistance at the toll booths if needed - although IMO few of them are now manned.... so you may be working via an intercom with a French speaker determined to speak at the same rate as Usain Bolt runs i.e. to complete every conversation in less than 9.58 seconds..... and they do not always have the ability (or willingness) to speak English.
The one thing that UK citizens DON'T get is the Priority Card for use in supermarkets..... I have a special photo-id card which allows me to go straight to the front of the lane displaying the wheelchair
Priorite sign - that can save a considerable amount of time as the cashiers are not allowed to ignore the request, although the shoppers waiting may be less happy - but I have never been refused or made to feel REALLY guilty...... (but I don't like using it and rarely do).
http://www.focusondisability.org.uk/reciprocal-park-europe.html
Getting such a BB is a LOT harder than in the UK (and rightly so IMO), the form (no surprise there then) has to be obtained from the Mairie, then filled in by the disabled person, then by the GP, then again by the Mairie. It then has to be sent off by the Mairie to the correct office, and the wait then begins.......
that normally lasts about 3 months, and then a letter tells you that "you have been judged not disabled enough to receive a disability pension but have been awarded a BB plus ID card, my assessment was 79% disability and I had to have 80% for the pension - which was not my reason for requesting one..... what happens next time remains to be seen.....
The cards are valid for longer than in the UK - mine has a life of 6 years c/w 3 in the UK (?).
If anyone wants any more info. please ask, but generally BB cards are welcomed throughout Europe and generally concessions are available for visitors - but they are not always identical to the UK. I can use mine in the UK, but do not need to display the timeclock as they are not part of the package in France (I actually have a UK clock and do use that to ensure that I do not overstay my welcome).
Dave