U1 (Berlin U-Bahn) · Relations URL: https://knowledge.ivjn.us/en/concepts/ubahn-berlin-u1/relation.html The U1 is an east–west line of the Berlin U-Bahn, opened on 18 February 1902, with a length of 8.8 km and 13 stations, connecting Uhlandstraße with Warschauer Straße. Page 1 / 0, 0 total