As there was limited space available for the flyover, this was worked out into an underpass for cyclists on top of the underpass for car traffic. This solved a traffic bottleneck in Hilversum's inner ring road. The stacking made it possible to transform a piece of city, intersected by a main traffic artery, into an attractive and well-connected environment, designed with lots of environmental quality for pedestrians and cyclists.

The starting point for the design of this large-scale infrastructural structure was that the design in size, scale and choice of materials should match the surroundings as closely as possible and that the underpasses should be experienced as socially safe. For the design of the public space around the Alexia Tunnel and the walls along the entrances, therefore, baked stone was chosen in a color scheme that matches the surrounding buildings. Glass parapets along the tunnel walls provide as much light as possible in the entrances and a view through to ground level. Elongated light elements behind translucent panels in the wall guide motorists and provide a rhythm in passing.

With input from local residents, a work of art was added for the underpass for cyclists in the form of perforated panels in a light color scheme. The chosen materials with attention to rhythm and detailing in the elaboration are intended to give this large civil engineering work a human scale; something in which Hilversum's architecture and public space have a rich tradition.

On April 20, the professional jury of the Hilversum Architecture Prize unanimously chose the Alexia Tunnel as the winner of the prize.