page_title: Line B (Buenos Aires Underground)
section_title: Rolling stock
hierarchical_section_title: Line B (Buenos Aires Underground) / Rolling stock
caption_attribution_description: anden y escalera de la Estación Echeverría de la Línea B del Subte de Buenos Aires; día de la inauguración
context_page_description: Line B of the Buenos Aires Underground runs 11.75 kilometres from Leandro N. Alem to Juan Manuel de Rosas in Villa Urquiza. Line B opened to the public on 17 October 1930.
  In recent years, it has held the title of being the most used line, and increased even more so after the opening of a section of tunnel between Los Incas station in the neighborhood of Parque Chas and a shopping centre in Villa Urquiza. It was the first line in Buenos Aires whose stations had turnstiles and moving stairways.
  It is the only line that uses third rail current collection, while the rest collect electric current from overhead lines, though there has been ongoing conversion to overhead lines to incorporate new rolling stock. Its gauge of 4 ft 8 ¹⁄₂ in is the same as the rest of the Buenos Aires underground system.
  The rolling stock currently used on the B line are former Tokyo Metro 300/500/900 stocks, which was used on Marunouchi Line and CAF 5000 stock. These Japanese units were acquired in the early 1990s, and offer less sitting room than the previous setup, increasing the line's capacity during peak hours.
context_section_description: Line B inaugurated with 56 English Metropolitan-Cammell cars (numbered from 101 to 156), of two bogies and metallic bodywork painted with cream and red colours on the exterior, with decorative artwork and dark blue coloured doors. Each car had two 105 HP motors. The interiors had 47 wooden seats, the majority with reversible back and three slide doors on each side, at the platforms level, of opening and closure commanded by the guard. One year later, 20 similar cars made by Osgood Bradley Car Company of the US were incorporated.
  The Japanese-built Eidan 300/400/500/900 sets, which ran on line B starting in 1996, were in service on the Marunouchi Line in Tokyo from 1959 through late 1995. In 2009, it was announced that the Madrid Metro has sold its oldest wide-profile trains to Buenos Aires. The 5000 series trains, which were in operation in Madrid since 1974, entered service in 2011 to replace some of the Eidan 300/400/500/900 sets that were utilized on line B starting in 1996.
  In July 2013, Madrid Metro sold 73 of its 6000 series cars (which entered service in Madrid in 1998) to Buenos Aires for €32.6 million in exchange for the retirement of the rest of the Japanese-built trains. The purchase of the CAF 6000 rolling stock has been met with major criticism due to the need for large and expensive alterations to accommodate the new rolling stock that was poorly adapted for Line B. Due to the 6000 series cars using overhead lines for power collection, in contrast to the existing and functional third rail electrification system of Line B, a new solid overhead catenary system had to be installed. The new overhead power collection system turned out be insufficient in powering the 6000 series cars resulting in the cars operating at reduced performance leading to lower acceleration.  The trains were are significantly narrower than the Line B's original loading gauge necessitating the need for modifications to the trains to reduce the large platform gap. These alterations made the second-hand units not any cheaper than simply purchasing new rolling stock, as was done with the 200 Series on Line A. The rolling stock suburban interior design was a poor fit for the urban Line B. The seating was arranged as transverse seating, designed for long distance comfort with limited standing room which is a poor fit to Line B's typically short passenger trips with high passenger turnover at each station. The trains also are not completely walk through trainsets as they were organized into married pairs. These factors and the narrow width of the train cars themselves lead to very poor internal passenger circulation. The shorter cars meant that a 6000 series six car train made poor use of the existing platform length compared to older six car trains. These factors lead to the new 6000 series rolling stock having a much smaller passenger capacity compared to the existing rolling stock.
caption: CAF 5000 train at Echeverría station.
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