Line A (Czech: Linka A) is a line of the Prague Metro, serving the Czech capital. Chronologically the second line in the system, it was first opened in 1978 and has expanded mostly during the 1980s. At present, it has 13 stations and 11.0 kilometres (6.8 mi) of track. An extension with a further four stations is currently under construction.
Construction of the first segment started in 1973, part of this segment was also a tunnel connecting this line with the already existing Line C between Muzeum and Náměstí Míru stations. After completion of the second section, work was started on the extension to the new metro depot at Hostivař. The 3.4 kilometres (2.1 mi) long tunnel was completed in 1985, and the second tube in 1987 with the new station Strašnická on that line. In 1990 Skalka station was opened, again on that line, and in 2006 Depo Hostivař station was opened, built in a former wash-stand of the depot.
Tunnel between Petřiny and Motol stations under construction, 2011
The first phase of an 18.7 billion CZK extension on the west end is currently under construction, from Dejvická station to Motol, which is forecast to open to the public in 2014. The second phase of this extension will see the line reach Prague Václav Havel Airport and is set to open by 2021.