Viaduc du Littoral
The Viaduc de la Nouvelle Route du Littoral on the island of La Réunion is the longest viaduct in the sea of France. It connects Saint-Denis to La Réunion at La Grande Chaloupe and replaces the current corniche road between Saint-Denis and Possession. Realised by Bouygues Travaux Publics, it was conceived to resist to cyclonic swells as well as drive away vehicles from risks of landslide of the cliff.
95% of the necessary works for the construction of the viaduct were prefabricated on land, then were transported and deposited by a sea route thanks to the Zourite barge (giant barge created to transport the viaduct piles).
Piles in the sea on which lies the viaduct