Metropolitano de Lima. Lines 2 & 4The project consists of a 35-year concession for the design, financing, construction, operation and maintenance of line 2 and a branch of line 4 of the Lima Metro to Jorge Chávez International Airport.

Line 2 runs from Puerta de Callao station to Municipalidad de Ate station and includes 26.87 km of tunnel, 27 stations (two interchanges), three third tracks, a yard-workshop in Santa Anita, and 27 ventilation and emergency shafts. The line 4 branch runs from Gambetta Station to Carmen de la Legua Station and includes 7.66 km of tunnel, 8 stations (one interchange), a yard-workshop in Bocanegra and 8 ventilation and emergency shafts.

The excavation is carried out with two TBMs operated in EPB mode as well as an 8 km section in conventional mode.

Protecnium contributed to the work with a Draftsman, BIM specialist, tunnel shift engineers, supervisors and Tunnel and Auscultation assistants.