The over 3 km long bridge allows you to cross the estuary of the Loire between Saint-Brevin and Saint-Nazaire. The vehicles there travel on a three-lane motorway and the traffic can be quite heavy at certain hours. Although it is possible, we urge you not to cross the bridge with your bike, because it is not suitable for bikes and is dangerous because of the wind and the road traffic. You can cross the bridge safely with a shuttle bus or taxi. Find out more at How to cross the bridge of Saint Nazaire ?