Vt 4 Lahdenväylä section between Ring Road I and Ring Road III and Ilmasilta grade-separated interchange; alliance, preliminary invitation to tender

Summary

The tender concerns an alliance contract for the construction of the Vt 4 Lahdenväylä section between Ring Road I and Ring Road III and the new Ilmasilta interchange in Helsinki. The works include additional lanes, improvements to existing interchanges, construction and widening of bridges, approximately 24,000 m² of piled slab, approximately 320 km of column stabilisation, 1.8 km of noise barriers, approximately 44,000 m² of groundwater protection, retaining walls, lighting renewal, utility relocations, georeinforcement and surcharge embankments. The estimated total project cost is approximately EUR 100 million. The development phase is expected to start in January 2027 and the construction phase during 2027. Applications must be submitted by 28 September 2026 at 10:00 UTC. Exact participation, exclusion, qualification and compliance requirements must be checked in the tender documents.