The new
Choisy-le-Roi bridge crosses the RER C suburban express railway lines serving
passenger traffic to and from the southern Paris region. The 70 m long bridge
has a traffic lane in each direction contained within wide footpaths to either
side. Connecting the recently rehabilitated Port district with its housing,
amenities, offices and Imprimerie Nationale workshops as well as Avenue Anatole
France to the town centre, the bridge is an essential element in guaranteeing
the success of this new district which, until now, has been cut off from the
city due to its location between the railway lines and the River Seine.
The need for
uninterrupted traffic flow – with the exception of a two hour break at night –
represented the point of departure for the project’s technical and
architectural design. It resulted in the bridge being designed as a straight
double beam preassembled on one side of the railway lines which was then pushed
out over the tracks in two operations, a solution that ensured that the overall
span did not require any intermediate supports.
The
infrastructure is contained within in a silvered perforated aluminium grid.
This cladding, inspired by the wrapping of the Pont Neuf bridge by Christo and
Jeanne-Claude, creates a memorable and poetic image without in any way
interfering with the specifically technical aspects of the construction. The
grid creates a pleat that provides the bridge with a fabric-like sensuality
while simultaneously revealing the presence of the structure. This aspect is
further emphasised by the green colour that is used, especially successful when
lit up at night. The result is that the grid offers a highly distinctive
atmosphere when crossing the bridge by car or on foot. The pleat envelops the
structure, protecting, surrounding and framing the views at either end. The
bridge presents itself as a uniting object, whether seen from above or from a
distance. Its unambiguous technology provides a highly visible expression of
the link created over the railway tracks and leading into the city. It is an
approach that also places emphasis on the “poetry of useful objects”, a way of
inserting itself into the city that avoids any need for formal gestures. The
bridge presents itself as an icon, an efficient yet familiar object able to
play a vital role in this rapidly changing urban environment.