The RN91 between Grenoble and Briancon is closed since saturday 24/01 due to
rock fall between Peage de Vizille and Sechiliennes.

This road allows to go to Oisans ski resorts : Alpe d'Huez , Les 2 Alpes ,
Serre Chevalier ...

There are detours but on smaller roads with lots of traffic jams.