The Millau Viaduct (French: le Viaduc de Millau) is a cable stayed road bridge that spans the valley of the River Tarn near Millau in southern France. It was formally opened on 14 December 2004 and opened to traffic on 16 December 2004.
Designed by British master-architect Lord Foster in collaboration with French bridge engineer Michel Virlogeux, it is the tallest vehicular bridge in the world, with one piers summit at 1, 118 ft (341 metres), slightly higher than the Eiffel Tower and only 132 ft (40 m) shorter than the Empire State Building.
The Millau Viaduct consists of an eight-span steel roadway supported by seven concrete piers. The roadway weighs 36, 000 metric tons and is 2, 460 m (8, 071 ft) long, measuring 32 m (105 ft) wide by 4.2 m (13.8 ft) deep. The six central spans each measure 342 m (1, 122 ft) with the two outer spans measuring 204 m (670 ft). The roadway has a slight slope of 3% descending from south to north, and curves in plan section on a 20 km (12.4 mile) radius to give drivers better visibility. It carries two lanes of traffic in each direction.