D215C, closed direction Col d'Herbouilly, between Bois-Barbu and Col d'Herbouilly

D221, closed direction Saint-Martin-en-Vercors, between Col d'Herbouilly and La Gratte

D215C, closed direction Villard-de-Lans, between Col d'Herbouilly and Bois-Barbu

D221, closed direction Col d'Herbouilly, between La Gratte and Col d'Herbouilly