Santiago metro line 3 tunnel in Chile

Santiago Metro Line 3 is a line of the Santiago Metro, Santiago, Chile, was opened on January 22, 2019. It connects the communes of Quilicura, Huechuraba, Conchalí and Independencia in the north of the city with the city centre, where most economic activity is concentrated, and the centre with the communes of Ñuñoa and La Reina in the east side of Santiago. The first 18 stations were completed by January 22, 2019, while the other three stations should be opened by 2022. It has 21.7 km of track.