The first phase of Line E runs from an interchange with Line A at Louise Michel in Grenoble city centre to Saint-Martin-le-Vinoux Town Hall and has eight stations, including a park-and-ride station at Casamaures-Village.
The remaining 6.7km section to Saint Égrève and Fontanil-Cornillion is due to open next year.
The €298m line is expected to carry around 45,000 passengers per day when both phases are operational.
