Line U6, Vienna U-Bahn

Line U6
Line U6 train at Siebenhirten
Overview
Type	Rapid transit
System	Vienna U-Bahn
Status	Operational
Termini	Floridsdorf Siebenhirten
Stations	24
Operation
Opened	1989
Operator(s)	Wiener Linien
Depot(s)	Michelbeuern, Rößlergasse
Technical
Line length	17.3 km (10.7 mi)
Track gauge	1,435 mm (4 ft 8 1⁄2 in)

Line U6 is a line on the Vienna U-Bahn metro system. It currently has 24 stations and runs 17.3 km from Floridsdorf to Siebenhirten, making it the longest line on the network. However its length will be surpassed by Line U1 in 2017. It is connected to Line U4 at Längenfeldgasse, Line U3 at Westbahnhof and Line U4 at Spittelau. The first section of the line opened in 1989, and was completed at its present length in 1995. It is the only metro line in the German-speaking area which is not operated by third rail but by overhead wire; this is because the center part of the line is an elevated part of the former Vienna Stadtbahn system, which was operated by overhead wire. When the line was transformed to metro it would have been too expensive to rebuild the elevated portion for high-floor trains and third rail as was done with the U4.