The bridge deck is slightly curved to help drivers maintain a natural trajectory and to enhance visibility.
It was built using a 'launching' technique, where the steel deck was slid from both sides of the valley until it met in the middle.
The structure can expand and contract by up to 60 centimeters due to temperature changes.
Its construction required the assembly of 36,000 tonnes of steel and 206,000 tonnes of concrete.
The seven pylons have a unique V-shaped design at the base to distribute the structural load efficiently.
It is designed to withstand wind speeds exceeding 200 kilometers per hour.
The bridge deck is tilted at a 3% grade to improve safety for vehicles traveling between the plateaus.
The Viaduc de Millau is the world's tallest bridge, with its highest mast peaking at 343 meters above the Tarn Valley. Designed by structural engineer Michel Virlogeux and architect Norman Foster, this multi-span cable-stayed bridge stretches 2,460 meters in total length. It acts as a critical link in the A75 autoroute, significantly bypassing the congested town of Millau. The bridge deck is suspended by 154 cables anchored to seven concrete piers of varying heights. It occupies a position higher than the Eiffel Tower, requiring complex aerodynamic wind-tunnel testing during construction. The structure crosses the Tarn River, connecting the Causse Rouge and the Causse du Larzac plateaus. Its deck sits 270 meters above the river level at its lowest point. As of June 2026, the structure remains fully operational as a key transit and architectural site in the Occitanie region.
The Espace Info Viaduc viewing platform provides a panoramic perspective of the entire structure.
Visit the 'Aire du Viaduc' viewing area for the most accessible ground-level vantage point.
Bring binoculars to observe the engineering details of the bridge deck from the visitor center area.
Pack layers as the wind speed and temperature on the plateaus can differ significantly from the valley floor.
Do not attempt to walk on the autoroute lanes; access is restricted to vehicles and designated visitor areas.
