Пуэрто-Мадеро
There would also have been a PreMetro C1 which would have connected with Line C and the Roca Line at Constitución railway station and headed northwards to Retiro railway station (parallel to Line C, but further east) and eastwards to Puerto Madero. The current extension of Line E northwards to Retiro will substitute this, but not the Puerto Madero section, which was briefly covered by the experimental Tranvia del Este.