Millau Viaduct, France (2004) designed by Norman Foster

angles and polygons

transformations and tessellations

triangles and bridges

  • Lord Norman Foster and Micheal Virlogeux designed the Millau Viaduct, the tallest bridge in the world. It gracefully spans the Tarn valley in Millau, France. The Millau Viaduct is a cable-stayed bridge with multiple cables, unlike the Morandi Bridge in Genoa, Italy which, lacking both robustness and redundant cables, catastrophically failed in the summer of 2018. The Morandi Bridge instead was supported by a single stay (cable) encased in concrete. This concrete encasement unfortunately prevented anyone from noticing any wear and tear in the cable that was cradled inside. The single cable design, combined with the internal rotting of the cable over time by the salty sea air, contributed to the unforgiving collapse. The sad twist to this tragedy is that the cables on one set of stays were entirely replaced in the 1990s. The bridge section that was supported by these cables remained in tact on that fateful day. Puzzlingly, the second set of cable stays were not replaced at all. In the end, it is this second set that failed on August 14th, 2018.  43 people lost their lives.