Drive to Grenoble and from there follow the direction "Bourg d'Oisans Briançon". At Rochetaillée, 10kms before Bourg d'Oisans, turn left to Allemont, cross the large hydroelectric dam, then turn left and follow the lake. Shortly after the hydroelectric museum, turn right to Vaujany.
You will arrive at the Grenoble SNCF station. It is linked to the closeby bus station where you will catch the bus N°3000 Grenoble-Bourg d'Oisans. More explanations below.
The bus company is Transisère.
From the Grenoble bus station, take bus #3000 or #3030
Grenoble-Bourg d'Oisans et stop at Rochetaillée (12kms from
Vaujany). At Rochetaillée you have a correspondance with bus N°3010
Rochetaillée Vaujany. This bus runs upon request only and has to
be reserved one day earlier before noon by calling +33 820 08 38
38 (0.118€/mn). If you need help, send us your schedule and we
will book it for you. Another possibility is to ask for a taxi (more
expensive).
Schedule line 3000 Schedule line 3010 Schedule line 3030
ALP ASSISTANCE TAXI Tel. +33 6 74 53 13 56
The approximate cost is 20 to 30€ from Rochetaillée to Vaujany. For groups, it might be worth to book a taxi from Grenoble train station to Vaujany, or from Lyon St Exupery airport to Vaujany.
Lyon St Exupery is the closest airport and is linked to Grenoble by frequent bus shuttles. The companies are FLIXBUS (online reservation) and BlaBlaBus. It takes about 1h05 to travel from lyon airport to Grenoble. Once in Grenoble, you have to take the bus N°3000 Grenoble-Bourg d'Oisans as explained above