The contract covers an 11.9km section of Line B with three stations and a 13km section of Line C with six stations, including two major interchanges. The joint venture will construct 19.61km of mined tunnels, 8.74km of bored tunnels, and 4.1km of cut and cover tunnel, together with 1.18km of viaduct.

The total budget for the two sections is €2.3bn.