Segment IV.C1

The segment IV.C1, opened in 2004, extends from Nádraží Holešovice to the temporary terminus Ládví. It is 4.0 kilometres (2.5 mi) long and contains two stations. Construction of this segment, which began in 2000, is perhaps the most difficult in the history of the Metro. Unique technology was used in constructing the tunnel under the river Vltava: The concrete tunnel tubes were made in a dry dock on the shore, the riverbed was excavated and the tubes were then laid down into the pits.^[1] The tunnels were due to the elimination of the piston effect, which is unpleasant to passengers in the stations, built as double-track. Station Kobylisy is the first and as of 2008 only single-vaulted bored station in the prague metro. This segment holds several records in the Prague metro:

• Longest distance between two stations – Nádraží Holešovice and Kobylisy, 2,748 m
• Highest above-sea-level station – Ládví, 282 metres (925 ft)
• deepest station below surface on line C – Kobylisy, 31 metres (102 ft)
• Highest climb between two stations – Nádraží Holešovice and Kobylisy, 120 metres (390 ft)

Segment IV.C2

After opening of the previous segment, the construction immediately continued in the direction of Prosek and Letňany. The construction lasted almost 4 years until it was opened on May 8, 2008. The segment from Ládví to Prosek is built using cut-and-cover methods, while the segment from Prosek to Letňany is mostly bored. It is 4.6 kilometres (2.9 mi) long and contains 3 stations.