Line D of the
Buenos Aires Underground
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 (Plaza de Mayo–Plaza Miserere) opened in 1913, making it the L ...
runs from
Catedral
Catedral may refer to:
* Catedral (Buenos Aires Underground), a station
* Catedral (district), a district of the San José canton, in the San José province of Costa Rica
* Cerro Catedral
Cerro Catedral is a mountain located from San Carlos ...
to
Congreso de Tucumán. The 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.
History
Line D was the second line to be built by the Compañía Hispano Argentina de Obras Públicas y Finanzas (CHADOPyF, Hispanic-Argentine Company for Public Works and Finances), following the construction of
Line C in 1934. Construction began in 1935 and the first part of the line was inaugurated in 1937 and ran 1.7 km from
Catedral
Catedral may refer to:
* Catedral (Buenos Aires Underground), a station
* Catedral (district), a district of the San José canton, in the San José province of Costa Rica
* Cerro Catedral
Cerro Catedral is a mountain located from San Carlos ...
(still the current terminus) to
Tribunales. Three years later, the section which brought the line to
Plaza Italia in
Palermo
Palermo ( ; ; , locally also or ) is a city in southern Italy, the capital (political), capital of both the autonomous area, autonomous region of Sicily and the Metropolitan City of Palermo, the city's surrounding metropolitan province. The ...
was completed, bringing the length of the line to 6.5 km.
The line was not properly extended until 1993 when it was extended to
Ministro Caranza, a station named after the
Radical politician. Further extensions occurred in the 1990s, beginning in 1997 with the opening of
Olleros and
José Hernández, then
Juramento in 1999, and finally
Congreso de Tucumán in 2000, where it currently terminates.
Over the decades it has been discussed numerous times whether to extend the line out to the limits of the city proper. The last of these proposals came forward in 2002 which would have seen an additional two stations added to the line. However, this was later abandoned since the line was already at full capacity after the opening of
Congreso de Tucumán station. In June 2015 the
Metrobus Cabildo line opened, connecting Line D from its terminus at Congreso de Tucumán to
Vicente López district in
Greater Buenos Aires
Greater Buenos Aires (, GBA), also known as the Buenos Aires Metropolitan Area (, AMBA), refers to the urban agglomeration comprising the Autonomous City of Buenos Aires
Buenos Aires, controlled by the government of the Autonomous City of B ...
, some kilometres away from the city limits, overlapping any theoretical extension of Line D. Line D is the only line in the network which will not be extended as part of the most recent expansion plan.
The line was closed for two months during the summer of 2024 to upgrade the signal system. However, after the update, the frequency was actually worse and the waiting time ceased to be shown on the stations.
Until the privatisation of the underground in the 1990s, Line D was identified by the red colour; whilst
Line B used green.
Museum Stations
Cultural activities occur at the Line D Juramento, Congreso de Tucumán and Olleros stations. These stations can be visited to see the exhibitions provided by the city's and national museums, education institutions and other civil society organisations.
“The objective of the museum-stations is to get the population acquainted with the huge cultural and historical patrimony that the City owns, thus turning the subway network, a massive transport medium, into an ideal diffusion agent. The lending of the facilities is absolutely free for the museum and institutions that wish to exhibit their activities or part of the historical or cultural patrimony they treasure”.
Rolling stock

Line D was originally served by
Siemens-Schuckert Orenstein & Koppel rail rolling stock, and then by
CAF cars. In 1999, cars from the
Nagoya Municipal Subway were purchased second hand from
Japan
Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...
and used on the line. In 2001, numerous
Alstom Metropolis 100 Series cars were purchased and built in Brazil and Argentina with the intention of incorporating them into
Line A, however they were ultimately put into service on Line D. More 100 Series cars were purchased up until 2009, making a total of 96 cars. Since 2019, much of the fleet was transferred to
Line E to serve alongside the Fiat Materfer cars on that line. The Alstom 100 fleet has been suspended on Line D since the 2024 January-March shutdown, as they do not yet have the capability to operate under
CBTC signalling.
The remaining Nagoya cars were moved to
Line C in 2007 and replaced with the 100 Series cars and with
Fiat-Materfer cars. To make the rolling stock more uniform, 24 more modern
300 Series Alstom Metropolis cars were ordered in 2013 to replace the Materfer cars on the line, which meant that the line was entirely composed of 120
Alstom
Alstom SA () is a French multinational rolling stock manufacturer which operates worldwide in rail transport markets. It is active in the fields of passenger transportation, signaling, and locomotives, producing high-speed, suburban, regional ...
cars. In September 2015, at a conference in Brazil, the head of SBASE gave a presentation in which the number of new cars to be purchased for the line was 84 instead of 30.
[Plan de modernización del Subterráneo de Buenos Aires]
– Buenos Aires Ciudad, September 2015. By 2016, the final figure had been fixed at 60 new cars, which meant that the line had 156 Alstom Metropolis cars by 2017.
The 300 Series cars now make up the entirety of Line D's fleet.
Gallery
File:Subterráneo Buenos Aires-Línea D-Tribunales.jpg, Tribunales station entrance
File:Magazine stand in Plaza Italia station.jpg, A magazine stand at Plaza Italia station
File:Estación 9 de Julio de la línea D de subtes por D2000.JPG, 9 de Julio station
File:Coche 3 - Linea D.jpg, Interior of 100 Series rolling stock
File:Coche 2 Linea D Subte.jpg, Alstom train
References
External links
Subterráneos de Buenos Aires (Official Page)Metrovías S.A. Subte Operator (Official Page)Subterráneos de Buenos Aires, D LineSystem map
{{Buenos Aires Transit
Buenos Aires Underground
Railway lines opened in 1937
Buenos Aires – Line D
1937 establishments in Argentina