Designed by the French structural engineer Michel Virlogeux and British architect Norman Foster, it is the tallest bridge in the world with one mast's summit at 1,125 ft above the base of the structure. It is the 12th highest bridge deck in the world, being 890 ft between the road deck and the ground below. The viaduct is part of the A75-A71 autoroute axis from Paris to Montpellier. Construction cost was approximately €400 million.