From 1 November 2026 to 31 March 2027, motorhomes travelling through the affected mountain communes must carry winter equipment: suitable tyres or anti-skid devices on board. The requirement covers 34 departments across six mountain ranges: the Alps, Corsica, the Massif Central, the Jura, the Pyrenees and the Vosges. Prefects set the list of communes, and road signs mark the regulated zones. Accepted equipment is four winter or all-season tyres marked 3PMSF, or removable chains or snow socks fitted to at least two driven wheels. The M+S marking alone is no longer sufficient. An IFOP survey found that 83% of drivers believe they know the rules, but only 20% correctly list all accepted options.
