How do you make an indisputably functional object into a thing of beauty? Jacques Ferrier Architectures seems to have done just that with its design for the new bridge in Choisy-le-Roi, near Paris. Contained within a perforated aluminium grid, the viaduct – crossing a busy railway line – seems to be swathed in fabric. The cladding was inspired by Christo and Jeanne-Claude’s wrapping of the Pont Neuf in the 1980s, and creates an almost poetic image without interfering with the construction of the bridge. A further atmospheric quality is added to the bridge thanks to its green colour, especially apparent when lit up at night. Pedestrians and traffic crossing the bridge are protected, surrounded and framed by the aluminium cage that envelopes the walkway. The viaduct presents itself as a uniting object which has been inserted into the city, familiar yet unmistakably efficient.