The project consists of excavation with 2 EPB type TBM of 9,86 m diameter metropolitan tunnel and a total length of about 7 km, including 2 attack wells, a disconnection well between the commercial line tunnel and the service tunnel and 7 associated shafts for ventilation and/or rescue.

The route crosses 3 municipalities and covers densely populated urban areas, crossing the particular lithology of the territory of the île-de-france.