The Basic Engineering project of Line 7 of the Santiago de Chile Metro was approved in 2017; its Environmental Impact Assessment (EIA) was submitted for evaluation in 2019 and was approved in 2021.
The project design focused on trains with autonomous driving, platform doors and catenary power (on the train), similar to the already existing Lines 3 and 6. WSP actively participated in both the engineering and the socio-environmental planning of this great project, and contributed its international experience to this initiative.
This new line will connect seven communes in Santiago, and will integrate three communes for the first time into the Metro network (Renca, Cerro Navia and Vitacura). This will help alleviate public congestion on Line 1 and reduce travel times between from one end of the city to the other by more than half, thereby contributing to the democratization of the city.
The line has an approximate extension of 26 km, and includes 19 stations, 2 terminals, 13 passing and 4 combination stations (two of them triple combination and two double combination). The route is completely underground, with an average distance of 1.4 km between stations. For its part, the civil works include the design of 17.5 km of tunnels between stations and 2.3 km of station tunnel. The construction will be carried out using the NATM method (traditional method) for 11.5 km, and the TBM (Tunnel Boring Method) for approximately 6 km.
It is estimated that this new line of the system will be inaugurated in 2028, and will cost approximately 2.528 million USD.