9 August 9, 2003 , two new stations, Tronador - Villa Ortúzar and De los Incas - Parque Chas , were inaugurated, allowing the line to transport more than 300,000 passengers per business day. Recent expansion and refurbishment In 2013 Line B was 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 line was provided. The new stations opened on 26 July 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 centres 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. Rolling stock Initially, the Line B had 56 English Metropolitan Cammell cars , with metal bodywork and two bogies, painted cream and red and with a capacity of 47 seated people. Each car had 3 double-leaf sliding doors on each side, at platform height, whose opening and closing was controlled by the guard, and had two 105 HP motors . Then 20 North American Osgood-Bradley cars were added. Between 1965 and 1967, 14 similar cars were purchased from Fabricaciones Militares , and between 1977 and 1979 , 20 units with 195 HP Siemens engines. In 1995, the replacement of the existing fleet began and in 1996 128 second-hand Japanese Tokyo Metro (formerly Eidan Subway) 300/400/500/900 rail cars were purchased that were in excellent condition. 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 was met with major criticism due to the need for large