Tallest in the world and taller than the Eiffel Tower, slung across the valley of the river Tarn, the Viaduct de Millau (Viaduc de Millau) is the chosen solution for taking the A75 motorway from Clermont-Ferraud south to Beziers. This is cheaper than the alternative of tunnelling through the hills flanking the river, and will shorten the journey by 100km and by up to 4 hours in the holiday season, as well as removing much traffic pollution caused by continual traffic jams for local inhabitants in Millau. The Millau Viaduct is currently the longest cable-stayed bridge in the world. It has a steel deck, rather than the more usual concrete roadbed.
take a LQQK it is very interesting viewing ,and reading..