Several more extensions were to take place including the northern one following the Leningrad Highway and the Moscow Canal into the Northern River Port in 1964. A southern one in 1969 passed the Nagatino industrial district and the Kolomenskoye park, the rest of the extension went into the future Kakhovskaya line. In 1984 a third extension commenced in two stages to the southeast past the Tsaritsyno park and into the Orekhovo-Borisovo housing massifs. A flooded tunnel, however forced the new branch to close a day after and for the next two and a half months. In late 1985 the second stage was completed, reaching a length of 36.9 kilometres with 20 stations and a daily passenger traffic of 1.8 million people.