Grosshof Bridges in Kriens
When Complexity Needs a Shared Vision.
To reduce through-traffic in the center of Lucerne, a new highway tunnel is being built in the western part of the city toward Kriens. At the southern portal, the existing Grosshof Bridge is being expanded into an eight-lane, multifunctional structure: a highway runs through its middle level, while a publicly accessible rooftop park offers sweeping views of Pilatus and the surrounding Alps.
The Grosshof Bridge brings together an extraordinary density of design considerations: infrastructure, engineering, architecture, landscape, traffic, public space, and new housing all intertwine. Long-term planning strategies from ASTRA meet contemporary demands for open spaces, new uses, and high-quality public areas.
Services
Public-space visualizations
Consulting and process facilitation
Coordination of specialist planners
Photography and drone imagery
Image retouching and compositing
Our role was to coordinate, consolidate, and make this complexity visible. Working closely with all involved specialists, we turned the visual representation into a shared working tool. Every detail from traffic flow to carefully selected, site-specific vegetation that can thrive under the exposed conditions of the bridge park helped create a complete understanding of the project.
Green Oasis on the Roof
The bridge rises from the Sonnenberg slope, spans Lucerne Street and merges with the topography of the motorway entrance on the opposite side. Between Sonnenberg and Salesiahügel, it forms a landscape-integrated gateway—part of its surroundings rather than a staged spectacle. The rooftop park connects to existing paths and links Sonnenberg directly to the motorway park. Underneath, a promenade becomes a three-dimensional space for play and social encounters, while gentle rows of trees create a transition to adjacent new buildings.
Architecture that Creates Added Value
Our work was not about simplifying a complex project, but about bringing together multiple disciplines into a single, shared vision.
In doing so, a structure that serves many purposes becomes understandable and, precisely because of its complexity, requires clear visual coordination.
