In June 2019, the Pulvermühle viaduct, which spans the Alzette valley in Luxembourg City, was completed after ten years of work. The complexity of the project lay in the divergent nature of the three facets involved: the hybrid concrete-and-steel structure of the viaduct itself, a section on a stone embankment to stabilise the existing slope, and a tunnel under the highway to connect all this to the station.
