Stockholm City Line, railway tunnel in Stockholm
The Stockholm City Line is a railway tunnel running beneath Stockholm that carries commuter trains through the city center. The approximately 7.4 kilometer tunnel connects two underground stations: Stockholm City beneath the T-Centralen hub and Odenplan beneath the Odenplan square, each with dedicated platforms and direct connections to the metro and bus systems.
The project was first proposed in the late 1980s but was not seriously pursued until after 2006 due to high costs. Construction began in 2007 and was completed in 2014, with the official opening in July 2017 to double the capacity of Stockholm's rail network.
The line takes its name from its role as a central transit artery for the city. Visitors can observe how the stations integrate with daily commuter life and how the underground passage has become a routine part of moving through Stockholm.
The tunnel operates entirely underground with trains running up to 24 times per hour in each direction throughout the day. Both stations feature escalators and offer direct access to the metro and bus stops, making navigation straightforward for travelers.
The tunnel runs partially beneath the waters of Söderström, connecting the island of Riddarholmen to the southern shore through underground rails. This enables a direct link between otherwise separated neighborhoods without disturbing the waterway above.
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