The Berlin U-Bahn is a rapid transit system in Berlin, Germany's capital and largest city, and a major part of the city's public transportation system. Inaugurated in 1902, the Berlin U-Bahn has played an important role in shaping the city's identity and meeting the growing transportation needs of its residents. The U-Bahn serves 175 stations spread over nine lines, with a total track length of 155.64 kilometres, about 80% of which is underground. With its distinctive blue and white signage, the U-Bahn network consists of 10 lines, denoted as U1 to U9 and U55, which run through diverse neighborhoods of Berlin and connect major destinations. As an integral part of Berlin's comprehensive public transport system, the U-Bahn seamlessly integrates with the S-Bahn, buses and trams, creating a cohesive and well-connected transit network.
