U1 (Vienna U-Bahn)

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Line U1 U-Bahn-Linie U1
Line U1 train at Kagran
Overview
Status	Operational
Termini	Oberlaa Leopoldau
Connecting lines
Stations	24
Service
Type	Rapid transit
System	Vienna U-Bahn
Operator(s)	Wiener Linien
Depot(s)	Kagran (closed 2006), Leopoldau, Neulaa
History
Opened	25 February 1978 (1978-02-25)
Technical
Line length	19.3 km (12.0 mi)
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
Electrification	750 V DC third rail

Line U1 is a line on the Vienna U-Bahn metro system.^[1] Opened in 1978, it currently has 24 stations and a total length of 19.3 km (12.0 mi), from Oberlaa to Leopoldau. When the extension to Oberlaa was completed in 2017, the line became the longest on the network, surpassing the length of U6.^[2]

The line is connected to U2 at Karlsplatz and Praterstern, U3 at Stephansplatz, U4 at Karlsplatz and Schwedenplatz.