page_title: Buenos Aires Underground rolling stock
section_title: Line H
hierarchical_section_title: Buenos Aires Underground rolling stock / Lines / Line H
caption_attribution_description: Español: Alstom serie 300 en su primer día de funcionamiento en la línea H del Subte de Buenos Aires.
context_page_description: 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.
context_section_description: When Line H was opened in 2007, its short length meant that it could be temporarily served by Siemens-Schuckert Orenstein & Koppel cars until it was extended enough to warrant the incorporation of new rolling stock. For this purpose, 120 new Alstom Metropolis 300 Series cars were ordered from Brazil and began arriving in Buenos Aires in August 2015 in time for the line's extension northwards to Santa Fe. The 20 trains with 6 cars each are to make up the entirety of the rolling stock of the line as it continues to be extended. 
  The first 300 Series cars were put into service in July 2016, with the remainder being phased in throughout 2016 and 2017, increasing frequencies to an average of 3 minutes as a result of the increased number of trains as well as the use of Communication Based Train Control (CBTC). The incorporation of these cars also meant the retirement of the Siemens-Schuckert Orenstein & Koppel cars, which was the oldest serving stock on the network.
caption: Interior of a 300 Series car.
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