page_title: Line B (Buenos Aires Underground)
section_title: Recent expansion and refurbishment
hierarchical_section_title: Line B (Buenos Aires Underground) / Recent expansion and refurbishment
caption_attribution_description: English: Pasteur station on Line B of the Buenos Aires Underground
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 was recently extended underground further west (2 km) from Los Incas/Parque Chas to Echeverría and Juan Manuel de Rosas (previously named Villa Urquiza) where transfer to the Ferrocarril Mitre is provided. The new stations opened in July 26, 2013.
  Further plans include: installation of a new signal system, acquisition of new cars, construction of a new central workshop for the repair of machinery, widening of platforms, hallways and all areas of pedestrian traffic at stations and at transfer nodes, improvements in  transfer centers with other means of  transport
  Some refurbishment on the line has come under criticism, mostly due to the overwhelming colour of the new murals, but also due to alleged cases where the historic artwork of the line has been destroyed during the line's modernisation.
caption: Overhead lines were added for the CAF 6000 trains.
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