New laws have been introduced which will mean that all drivers on French roads must carry breathalyser kits.
Though the laws have just been introduced, foreign drivers have a period of grace, until November, to get used to the new regulations which will result in anyone failing to produce a kit upon request having to pay a fine of €11. The new regulations apply to all vehicles apart from mopeds and are part of an effort by the French government to cut down on the number of drink-related road deaths.
Police in France have already warned UK drivers that there will be random checks carried out on those crossing the Channel. The motivation for bringing in the law is to see more drivers testing themselves to check that they are under the drink-drive limit which, in France is 50mg of alcohol in 100ml of blood, lower than the UK’s limit of 80mg.
https://www.theguardian.com/world/2012/jul/01/drivers-france-carry-breatha...