Line 3 (São Paulo Metro)
But after a lengthy debate, it was decided that it would be constructed on the surface, taking advantage of the old Rede Ferroviária Federal train bed and sharing 23 kilometres (14 mi) of its lines—a move that prevented many expropriations.With this design change, the East-West line would then be more than 30 kilometres (19 mi) long between Praça da Sé and Guaianases, parallel to the railroad tracks.The stretch between Guaianases and Calmon Viana, in Poá was planned to be built in a second phase, making full use the rail bed.On May 2–3, 2009 the stretch between Anhangabaú and Santa Cecília stations was closed to allow for the use of a tunnel boring machine being used for the extension project of Line 4 (Yellow).In 2010 work began on the installation of glass doors on the Line 3 platforms, starting with the Vila Matilde, Carrão and Penha stations.