Line B

On february 13th, 1912, the National Congress approved the law Nº 8870, by which “Lacroze Hnos y Cía” obtained the right to build and exploit a subway line of electric traction, for passengers and cargo transport, which’s circuit would be placed between the surroundings of the Lacroze station and Paseo the Julio (today, L. N. Alem), passing under Av. Triunvirato (today, Av. Corrientes).

Line B officialy inaugurated its first stretch on October 17th, 1930, and during the first two initial days (Saturday 17th and Sunday 18th), 380,000 passengers travelled in the 32 available wagons. Eight months later, on June 22nd, 1931, the second strech up to Carlos Pellegrini was inaugurated, and five months later (December 1st, 1931) was its terminal station, L.N. Alem, which completed the course that covered 8.94 km and included thirteen stations. The new line brought two innovations that delighted the public: the air extractor fans and the instalation of escalators in the stations Agüero (today, Carlos Gardel), Pueyrredón, Pasteur and Callao.

On August 2003, stations Tronador and Los Incas were inaugurated, fulfilling a total of 15 stations and a 10 km extension. Line B transports, nowadays, an average of 313,000 passengers per working day.