Line D
Entrance toCallao station.
Overview
Termini	Catedral Congreso de Tucumán
Stations	16
Service
Type	Rapid transit
System	Buenos Aires Underground
Operator(s)	Emova
Rolling stock	100 series · 300 series
Daily ridership	328,000 (2018)[1] 1.04%[2]
History
Opened	3 June 1937 (1937-06-03)
Technical
Line length	11 km (6.8 mi)
Character	Underground
Track gauge	1,435 mm (4 ft 8+1⁄2 in)
Electrification	Overhead line, 1,500 V DC
Route map Legend Service tunnel Catedral Service tunnels 9 de Julio Tribunales Callao Facultad de Medicina Pueyrredón Agüero Bulnes Scalabrini Ortiz Canning Workshops Plaza Italia Palermo Apeadero Carranza Ministro Carranza Olleros José Hernández Juramento Congreso de Tucumán Manuela Pedraza Garages This diagram: view talk edit

This article needs to beupdated. Please help update this article to reflect recent events or newly available information.(October 2022)

Line D of theBuenos Aires Underground runs fromCatedral toCongreso 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.

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 ofLine C in 1934. Construction began in 1935 and the first part of the line was inaugurated in 1937 and ran 1.7 km fromCatedral (still the current terminus) toTribunales. Three years later, the section which brought the line toPlaza Italia inPalermo was completed, bringing the length of the line to 6.5 km.

The line was not properly extended until 1993 when it was extended toMinistro Caranza, a station named after theRadical politician. Further extensions occurred in the 1990s, beginning in 1997 with the opening ofOlleros andJosé Hernández, thenJuramento in 1999, and finallyCongreso de Tucumán in 2000, where it currently terminates.^[3]

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 ofCongreso de Tucumán station.^[4] In June 2015 theMetrobus Cabildo line opened, connecting Line D from its terminus at Congreso de Tucumán toVicente López district inGreater Buenos Aires, some kilometres away from the city limits, overlapping any theoretical extension of Line D.^[5] 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.^[6]

Until the privatisation of the underground in the 1990s, Line D was identified by the red colour; whilstLine B used green.

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”.^[7]

Line D was originally served bySiemens-Schuckert Orenstein & Koppel rail rolling stock, and then byCAF cars. In 1999, cars from theNagoya Municipal Subway were purchased second hand fromJapan and used on the line. In 2001, numerousAlstom Metropolis100 Series cars were purchased and built in Brazil and Argentina with the intention of incorporating them intoLine 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.^[8] Since 2019, much of the fleet was transferred toLine 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 underCBTC signalling.

The remaining Nagoya cars were moved toLine C in 2007 and replaced with the 100 Series cars and withFiat-Materfer cars. To make the rolling stock more uniform, 24 more modern300 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 120Alstom cars.^[9] 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.^[10] By 2016, the final figure had been fixed at 60 new cars, which meant that the line had 156 Alstom Metropolis cars by 2017.^[11] The 300 Series cars now make up the entirety of Line D's fleet.

• Siemens-Schuckert Orenstein & Koppel (1937-1980)
• Caf General Electric (1964-2004)
• 250/300/1200 Series (1999-2007)
• Fiat-Materfer (1980-2018)

• 100 Series (2001-Present)
• 300 Series (2018-Present)

• 
  Tribunales station entrance
• 
  A magazine stand at Plaza Italia station
• 
  9 de Julio station
• 
  Siemens O&K at the inauguration ofLine D (1937)
• 
  Interior of100 Series rolling stock
• 
  Alstom train

Wikimedia Commons has media related toLine D.

• Subterráneos de Buenos Aires (Official Page)
• Metrovías S.A. Subte Operator (Official Page)
• Subterráneos de Buenos Aires, D Line
• System map

• Buenos Aires Underground
• Railway lines opened in 1937
• Railway lines in Argentina
• 1937 establishments in Argentina

• CS1 Spanish-language sources (es)
• Webarchive template wayback links
• CS1 European Spanish-language sources (es-es)
• Articles with short description
• Short description is different from Wikidata
• Wikipedia articles in need of updating from October 2022
• All Wikipedia articles in need of updating
• Commons category link is on Wikidata