The construction project at the Häggvik commuter train station is progressing
31.10.25NYAB is working on the expansion of Häggvik commuter train station in Sollentuna, where a new entrance will be constructed on the southern side. The project, which began in March 2025, is a key part of the development of the growing area. As new housing, services, and commerce are planned, the infrastructure must be adapted and upgraded for the future.
The worksite is located between the tracks, which places special demands on safety and coordination. Machinery and personnel operating in a confined space require meticulous planning.
The work is being carried out on a heavily trafficked stretch with four tracks. For six summer weeks, the inner tracks were closed. Commuter trains were therefore moved to the outer tracks, where speed was reduced from 200 km/h to 70 km/h. During the train stoppage, several critical tasks were completed: 450 piles were drilled through boulders and moraine and anchored one and a half meters into solid bedrock. These were then reinforced and cast. Excavation work is now underway to enable concrete work at the base of the ramp.
“We use tubular sheet piling because it allows for deep excavations in tight environments and contributes to both shorter construction time and longer lifespan of the structure,” says site manager Peder Colbiörnsen.
Safety first
The project is complex and challenging in many ways, not least logistically. During the train stoppage, work was carried out around the clock, often involving loading over active tracks, which requires meticulous planning and a strong focus on safety. All employees have undergone track safety training, and all work in the track environment is monitored by safety consultants to ensure it is carried out as safely as possible.
“It’s important not to compromise on safety and to foster a culture where awareness of it is high,” says Peder Colbiörnsen.
Good collaboration is key to success
Coordination between multiple stakeholders and within the project is crucial for efficient progress.
“It’s working well, and I’m proud of all the team members. We have a great atmosphere in the project, something we’ve worked purposefully to achieve. When people feel engaged and involved, they contribute to a positive work environment.”
NYAB and the Swedish Transport Administration (Trafikverket) work closely together and even share premises, which makes it easy to check in regularly, creates short decision paths, and ensures smooth information flow. Another success factor is Trafikverket’s project management being stationed on site. Their leadership and technical expertise serve as inspiration for younger employees.
“Our collaboration runs extremely smoothly, and everyone is focused on a successful final product. We solve challenges quickly and flexibly together and gain valuable insights into how Trafikverket manages projects.”
Phase 2 of the project begins in February 2026, when the station entrance building and the superstructure of the ramp to the existing platform will be constructed. The inauguration is scheduled for summer 2027.
“It’s very gratifying that NYAB has been entrusted with phase 2,” says Peder Colbiörnsen, and continues: “I see this as more than just a station entrance—it’s a step toward increased accessibility and a sustainable, future-proof public transport system.
