In the 1970s, the line was extended in two stages: from Diego de León to Alfonso XIII (1973) and from Alfonso XIII to Esperanza (1979).
В 1970-х Линию продлевали 2 раза, от Диего де Лион до Альфонсо 13 (1973) и от Альфонсо 13 до Есперанза (1979).