Transport in Argentina is mainly based on a complex network of routes, crossed by relatively inexpensive long-distance buses and by cargo trucks. The country also has a number of national and international airports. The importance of the long-distance train is minor today, though in the past it was widely used and is now regaining momentum after the re-nationalisation of the country's commuter and freight networks. Fluvial transport is mostly used for cargo.
The Buenos Aires Underground, locally known as Subte, is a rapid transit system that serves the area of the city of Buenos Aires, Argentina. The first section of this network opened in 1913, making it the 13th subway in the world and the first underground railway in Latin America, the Southern Hemisphere, and the Spanish-speaking world, with the Madrid Metro opening five years later, in 1919. As of 2015, Buenos Aires is the only Argentine city with a metro system, but there is a proposal to build a metro in the city of Córdoba, while a proposal to build a metro in Rosario was shelved in favour of a tramway network.
Line F is a planned addition to the Buenos Aires Underground. After some delays, the budget was announced in 2015 for the first phase of construction from Constitución to Córdoba at a total cost of between 700 and 800 million dollars. As of 2015, it was not yet known if construction would be done as a turnkey project or build to order, however construction was due to start in 2016.
Line A is the oldest line of the Buenos Aires Underground. Opened to the public on 1 December 1913, the first underground line in South America, the Southern Hemisphere and the Spanish-speaking world. It made Buenos Aires the 13th city in the world to have an underground transport service. The line stretches 9.8 km from Plaza de Mayo and San Pedrito and runs under all of the Avenida de Mayo and part of the Avenida Rivadavia, and is used by 258,000 people per day.
Line B of the Buenos Aires Underground runs 11.75 kilometres (7.30 mi) from Leandro N. Alem to Juan Manuel de Rosas in Villa Urquiza. Line B opened to the public on 17 October 1930.
Line C of the Buenos Aires Underground, that runs from Retiro to Constitución terminus, opened on 9 November 1934, and it has a length of 4.3 km (2.7 mi). It runs under such streets as Lima Sur, Bernardo de Irigoyen, Carlos Pellegrini, Esmeralda, la Plaza San Martín and Avenida Ramos Mejia. It not only connects to every other line on the system, but its termini at Retiro and Constitución also connect it to some of the most important commuter rail networks in Buenos Aires, such as the Mitre and Roca lines and also long distance passenger services. It is thus an important artery in Buenos Aires' transport system. At the same time, it is also the shortest line in both terms of length and number of stations.
Line D of the Buenos Aires Underground runs from Catedral to Congreso de Tucumán. The D Line opened on 3 June 1937 and has been expanded to the north several times. The line is currently 11 km long and has 16 stations, while running approximately parallel to the city's coastline.
Line H is a line of the Buenos Aires Underground. The first phase, between Plaza Once and Caseros, opened 18 October 2007, currently stretches over 8.8 km between Hospitales and Facultad de Derecho stations. It is the first entirely new line built in Buenos Aires since the opening of Line E on 20 June 1944.
Line E of the Buenos Aires Underground, which runs from Retiro to Plaza de los Virreyes, currently extending a total distance of 12 km. Opened in 1944, the Line E was the last completely new line to be added to the Buenos Aires Underground, until 2007 when Line H was opened. The line has a history of being re-routed and extended due to having been historically the line with the lowest passenger numbers on the network.
Line G is a planned addition to the Buenos Aires Underground which has been on the drawing board in numerous forms since the 1930s. After a failed attempt at financing and building the line in 2009, its most recent proposal was put forward in 2015 by the government of Buenos Aires.
The Premetro is a 7.4-kilometer long (4.6 mi) light rail line that runs in the outskirts of Buenos Aires, connecting with the Buenos Aires Underground line E, at Plaza de los Virreyes station and runs to General Savio, with a short branch to Centro Cívico. It opened in 1987 and is operated by Metrovías. Originally, the Premetro was to include many more lines, but shortly after the privatisation of the railways the projects were postponed and never materialised and only "Premetro E2" was built.
The San Martín line is a 70-kilometre (43 mi), 22-station commuter rail service in the metropolitan area of Buenos Aires, Argentina. The San Martín line operates from the city-centre terminus of Retiro north-west to Doctor Cabred in Luján Partido along a broad gauge line built by the British-owned Buenos Aires and Pacific Railway.
The Argentine railway network consisted of a 47,000 km (29,204 mi) network at the end of the Second World War and was, in its time, one of the most extensive and prosperous in the world. However, with the increase in highway construction, there followed a sharp decline in railway profitability, leading to the break-up in 1993 of Ferrocarriles Argentinos (FA), the state railroad corporation. During the period following privatisation, private and provincial railway companies were created and resurrected some of the major passenger routes that FA once operated.
Dorrego is a station on Line B of the Buenos Aires Underground. The station was opened on 17 October 1930 as part of the inaugural section of the line between Federico Lacroze and Callao.
The Buenos Aires Metrobus is a 50.5 km (31.4 mi) network of dedicated separated lanes and stations for normal buses that serve the city of Buenos Aires, Argentina. Designed as a Bus Rapid Transit system, it mixes a few bi-articulated buses with conventional buses. The headway is the same as before the implementation of the system, and it lacks the brand of the network in the buses that use it, maintaining their previous branding as common bus lines with their own numbers. The service operates 24 hours a day and 365 days a year, with 2-4 minute frequencies during the day and 10–15 minutes at night.
Red de Expresos Regionales is a planned mass transit system in Buenos Aires which will connect the main rail terminals of the city through 16 km (9.9 mi) of tunnels with a central terminal. The tunnels will mean that the existing 815 km (506 mi) commuter rail network will be connected, with passengers being able to travel from one part of Greater Buenos Aires and La Plata to the other while only making one change at the new underground central terminal. The project is modelled on the Réseau Express Régional in Paris. It is estimated that after the completion of the project, combined with the current renewal of the commuter rail lines' rolling stock, passenger numbers will double from 1.4 million passengers per day to 3 million.
The 200 Series is a set of underground cars manufactured by China CNR Corporation and CITIC Construction for use on Line A of the Buenos Aires Underground in Argentina. The cars were made in order to replace the 100-year-old La Brugeoise cars which operated on the line up until 2013. The Buenos Aires Underground ordered 45 of these units, followed by a further 105 which are currently being integrated into the line.
Parque de la Ciudad is a light rail station on the Buenos Aires Premetro. It was opened on 29 April 1987 together with the other Premetro stations. The station is located in the Barrio of Villa Soldati.
The Buenos Aires Underground has one of the most diverse metro fleets in the world, and has had some of the oldest models in operation on any network. The network began with a relatively standardised fleet, but throughout its over 100-year-long history, it has seen numerous purchases which have created cases where some lines operate numerous models. Recently there have been increased efforts to modernise and standardise the fleets, with large purchases from China CNR Corporation and Alstom.
The 300 Series are a number of underground cars manufactured by Alstom in Brazil for use on the Buenos Aires Underground. They are used on Line H of the network, and more are to be introduced on Line D where they will serve alongside the similar 100 Series.
Line I will run Parque Chacabuco ("Directorio") to Ciudad Universitaria with 18 new stations. The route length is 12.6 km. The future of this line (which had the lowest priority in the expansion plans) is currently uncertain since it has been proposed that a Metrobus line be built instead, which would follow the same trajectory as the line. [1] 
