You can help expand this article with text translated from the corresponding article in German. (March 2018) Click [show] for important translation instructions. View a machine-translated version of the German article. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must follow the LLM translation guideline, revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing German Wikipedia article at [[:de:U-Bahn-Linie 4 (Wien)]]; see its history for attribution. You may also add the template {{Translated|de|U-Bahn-Linie 4 (Wien)}} to the talk page. For more guidance, see Wikipedia:Translation.

Line U4 U-Bahn-Linie U4
Line U4 train at Kettenbrückengasse
Overview
Status	Operational
Termini	Hütteldorf Heiligenstadt
Connecting lines
Stations	20
Service
Type	Rapid transit
System	Vienna U-Bahn
Operator	Wiener Linien
Depot(s)	Wasserleitungswiese, Hütteldorf
History
Opened	8 May 1976; 50 years ago (1976-05-08)
Last extension	1995
Technical
Line length	16.5 km (10.3 mi)
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
Electrification	750 V DC third rail

Line U4 is a line on the Vienna U-Bahn metro system. Opened in 1976, it currently has 20 stations and a total length of 16.5 km (10.3 mi), from Hütteldorf to Heiligenstadt.^[1] It is connected to U1 at Karlsplatz and Schwedenplatz, U2 at Karlsplatz and Schottenring, U3 at Landstraße, U6 at Längenfeldgasse and Spittelau.

Line U4 currently serves the following stations:^[2]

• Hütteldorf (transfer to: -  P+R  park & ride facility)
• Ober St. Veit
• Unter St. Veit
• Braunschweiggasse
• Hietzing
• Schönbrunn
• Meidling Hauptstraße
• Längenfeldgasse (transfer to: )
• Margaretengürtel
• Pilgramgasse
• Kettenbrückengasse
• Karlsplatz (transfer to: )
• Stadtpark
• Landstraße (transfer to: )
• Schwedenplatz (transfer to: )
• Schottenring (transfer to: )
• Roßauer Lände
• Friedensbrücke
• Spittelau (transfer to: -  P+R  park & ride facility)
• Heiligenstadt (transfer to: )

• Media related to Metro line U4 (Vienna) at Wikimedia Commons