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Kaiserstrasse Light Rail Tunnel, Karlsruhe, Germany

Friday 04 Sep 2009

Tunnel of light

copyright: Allmann Sattler Wappner Architekten 
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Karlsrue to add 7 new stops to its underground network 

The Kaiserstrasse Light Rail Tunnel project proposes placing seven stops of the existing light rail network located in the city center below ground. This produces a new level within this public space. The density of visual and acoustic phenomena on the surface level is juxtaposed by the calm and restrained interior design of the stations. This permits a situation that comprises a counterpoint to the surface-level pedestrian area. All station stops feature a comprehensive, unified design. The result of a competition, the concept offers the client the unique opportunity to provide this central area of the city of Karlsruhe with a subterranean organisational guiding principle.

The interiors of the individual stops are determined significantly by the geometry of the structural engineering. The exterior context of the individual sites in the city center of Karlsruhe defines the specific building volumes. This provides each station stop with a unique character and high recall value. The design is distinguished by two spatial categories. The transfer space encompasses the entire area of stairways and mezzanine levels to the lowermost steps leading to the platform level. Here, the configuration of the structural engineering is depicted directly by omitting, as far as possible, inbuilt structures or paneling. The actual common and waiting area on the platform level features a light and calming character.

Transitions with rounded shapes and the homogeneity of the light-coloured surfaces covering floors, wall, and ceiling create an almost meditative space. The illumination is freely suspended along a nearly immaterial wiring construction, reminiscent of overhead power lines. Type and distribution of lighting fixtures create differentiation within the interior and also complement it by use of colorful accents. Service of the light rail tunnels will begin in 2016. Simultaneously, the urban plazas and streets on the surface level will receive a redesign.

Key Facts

Status Concept Design
Value 0(m€)
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Allmann Sattler Wappner Architekten GmbH

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