The U4 is a line of the Hamburg U-Bahn, which opened in 2012, serving 12 stations. It is the shortest line of the network, with a length of 11.9 kilometres (7.39 mi) and from Jungfernstieg to Billstedt it shares tracks with the U2.^[1][2][3] Its identifying colour, as seen on route maps, trains, and station signs is turquoise.^[4][5]

You can help expand this article with text translated from the corresponding article in German. (November 2015) 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 revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Consider adding a topic to this template: there are already 9,119 articles in the main category, and specifying|topic= will aid in categorization. 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-Bahnlinie 4 (Hamburg)]]; see its history for attribution. You may also add the template {{Translated|de|U-Bahnlinie 4 (Hamburg)}} to the talk page. For more guidance, see Wikipedia:Translation.

Quick Facts Overview, Stations ...

U4
Overview
Stations	12
Service
Type	Rapid transit
System	Hamburg U-Bahn
Operator(s)	Hamburger Hochbahn
History
Opened	2012
Technical
Line length	11.9 km (7.4 mi)
Track gauge	4 ft 8+1⁄2 in (1,435 mm)
Route map v t e Legend     to Mümmelmannsberg Billstedt Legienstraße Horner Rennbahn Rauhes Haus Hammer Kirche Burgstraße Berliner Tor Hauptbahnhof Nord Jungfernstieg     to Niendorf Nord Überseequartier HafenCity Universität Elbbrücken ¹  shares tracks with

Close

The U4 is the newest line of the Hamburg U-Bahn and the first line that is to form as a branch of an older, existing line. It shares the U2's tracks from Billstedt to the major transfer station Jungfernstieg, located in the city center, branching off 165 meters (541 ft) before the station and stopping at the outer tracks of the four-platform station. It then traverses under the Neustadt in a far-swinging 180° bend and reaches the newly built Überseequartier station in HafenCity after about 3 kilometres (1.9 mi). The following station, HafenCity Universität lies about 650 meters (2,130 ft) to the east in the Elbtorquartier. On 7 December 2018 the line was extended 1.3 km (0.81 mi) eastward, to a new terminus at Elbbrücken, allowing for a future S-Bahn connection with lines S3/S31.^[6]

The line runs almost entirely underground, only surfacing at Elbbrücken and Billstedt at both ends. There is also a short uncovered section east of Burgstraße.

• Elbbrücken
• HafenCity Universität
• Überseequartier
• Jungfernstieg
• Billstedt (shared with U2)