Buenos Aires Underground (Subterráneo de Buenos Aires)

The Buenos Aires Underground, Argentina's first and oldest metro system, set out on its inaugural journey on December 1, 1913, making it the first metro system in the Southern Hemisphere. Initially known as "PreMetro", the system was established to address the growing transportation needs of Buenos Aires and provide a modern and efficient method of urban transit. Currently, the underground network has six lines—A, B, C, D, E and H—covering 56.7 kilometers of route serving 90 stations. The network is complemented by a 7.4 kilometer long premetro line and a 26 kilometer long Urquiza suburban line, with a total of 17 more stations. Traffic on the lines runs on the left because Argentina ran on the left when the system opened. More than one million passengers use the network, which also provides connections with the city's extensive commuter rail and bus rapid transport network. With its deep history, diverse lines, and ongoing efforts to modernize and expand, the Buenos Aires Underground remains an important component of the city's public transportation network, playing a vital role in the daily lives of millions of residents and visitors.