Closure of Tapiolansilta bridge across Länsiväylä introduces a vehicle detour from 11 November 2026
Tapiolansilta will be closed to vehicle traffic on Wednesday, 11 November 2026 at roughly 5 o’clock in the morning. Tapiolantie will no longer provide direct access to Länsiväylä in the Helsinki direction; vehicles will instead be directed to the detour through Revontulentie. Vehicles from Helsinki and Tapiolantie to Westend will be directed to the same detour, which will remain in place until early autumn 2027. Helsinki-bound bus stop E2013 at Tapiolansilta will relocate to the detour on Revontulentie.
These traffic arrangements are part of the Ring Road I Keilaniemi and Länsiväylä Bridges project, which will see the replacement of Tapiolansilta bridge. The detour will increase traffic in Tapiola and on Revontulentie in particular.
After the closure of Tapiolansilta bridge, work will begin to prepare for the demolition of the current bridge and the construction of a new one. These include the removal of the bridge’s asphalt and topsoil, relocation of cabling and the construction of bored-pile walls. Tapiolansilta will be demolished in its entirety in early January, which will also induce temporary traffic arrangements on Länsiväylä, the details of which will be announced later.
“We must implement the traffic arrangements in a way to ensure the safety of both the construction site and traffic during the work. This will inevitably mean changes to familiar routes, and we ask that anyone travelling in the area remains patient. We aim to keep traffic flowing as smoothly as possible despite the changed arrangements,” says Jarmo Nirhamo, project manager at the Finnish Transport Infrastructure Agency.
Changes to pedestrian and cycling routes in Keilaniemi
In addition to the work on Tapiolansilta, construction works continue in Keilaniemi. The area will see civil engineering works, water supply construction, and the construction of the new Keilaniemi underpass. To keep pedestrians and cyclists safely separated from the construction site and construction traffic, the section north of Länsiväylä, between Keilalahdentie and Karhusaarensilta, will be closed to pedestrians and cyclists on Wednesday 11 November 2026.
Pedestrians and cyclists will be directed to a detour via Karhusaarensilta to the south of Länsiväylä, and from there towards Keilalahti through a route that passes under the Keilalahti overpass. This detour will remain in place until summer 2027.
“Construction works will now have a greater impact on routes. As the work progresses, there will be smaller changes to the routes in the area. We will let you know about these changes with signage,” says Ville Manninen, site manager at GRK Suomi Oy.