It crosses the right-bank half of the city center in the north-south directions and turns to the east at both ends of the line.
It is the system's oldest and most used line, being opened in 1974 and transporting roughly 26,900 persons per hour in the peak.
The line is 22.41 kilometres (13.92 mi) long and includes 20 stations, journey from one end to the other taking approx.
Between the Muzeum and Hlavní nádraží stations is the shortest distance in the system (ca.
In 1975 commenced the construction of the second segment, going from Kačerov to large housing estates in the southern parts of the city.
[1] The tunnels were due to the elimination of the piston effect, which is unpleasant to passengers in the stations, built as double-track.