Stockholm Metro Expansion: Project Profile

The Stockholm Metro Expansion is a multi-phase infrastructure project adding 27.4 km of new track and 16 new stations to the city’s public transport network. Representing the region’s largest public transport investment since the 1970s, the project is engineered to significantly increase network capacity, improve regional connectivity, and support sustainable urban growth through phased completions extending to 2034.

Technical Specifications

The project’s engineering scope involves extensive tunneling and complex systems integration. The Yellow Line extension to Arenastaden and the new Fridhemsplan-Älvsjö line feature stations constructed approximately 30 meters below ground, requiring advanced geotechnical monitoring and excavation techniques. A key network upgrade is the transformation of Gullmarsplan station into a major interchange, integrating the Blue, Green, and Red metro lines with light rail and bus services.

To support the expanded network, significant upgrades to power and maintenance infrastructure are underway. This includes the construction of a new converter station in Stadshagen to supply reliable traction power and a major expansion of the Högdalen depot. The depot expansion includes a new 2.5 km connecting track from the Green Line’s Farsta branch, two new maintenance workshops, and 1500m of additional staging track to service the increased rolling stock fleet.

Key Takeaways

• Strategic Capacity Enhancement: The expansion directly addresses projected population growth by adding capacity for an estimated 160,000 additional daily passengers, relieving congestion on critical corridors.
• Improved Network Connectivity: The creation of new interchanges at Gullmarsplan and Fridhemsplan, along with the extension of multiple lines, significantly improves transit times and provides access to previously underserved areas like Nacka, Barkarby, and Älvsjö.
• Commitment to Sustainable Infrastructure: The project is benchmarked against the CEEQUAL (Construction Environmental Assessment and Rating Scheme) international standard, ensuring high performance in environmental management, resource efficiency, and community relations during construction.

Frequently Asked Questions (FAQ)

When will the Stockholm Metro expansion be finished?

The Stockholm Metro expansion is being completed in phases. The northern Blue Line extension to Barkarby became operational in 2025. The extensions to Nacka (Blue Line) and Arenastaden (Yellow Line) are scheduled for completion by 2030, while the entirely new line between Fridhemsplan and Älvsjö is planned to open in 2034.

Who is building the new Stockholm Metro lines?

A consortium of leading European engineering and construction firms is building the new lines. Major construction work is being handled by companies including Skanska, OHLA, Implenia, and Itinera. Siemens Mobility is responsible for the critical electrification systems, while firms like Ramboll and Tyréns are leading the design and planning.