Nantes Bridge Transformation: Anne de Bretagne Bridge Set for Major Expansion

Nantes, France is undergoing a significant infrastructure project with the ongoing transformation of the Anne de Bretagne Bridge. The project, which began in March 2024, aims to triple the bridge’s width, accommodating two new tramway lines (Lines 6 and 7) and creating one of the widest bridges in Europe. A key milestone was recently achieved with the arrival of the new steel deck by barge from Italy.

Bridge History and Current Status

The Anne de Bretagne Bridge, opened in 1975, spans the bras de la Madeleine, a branch of the Loire river, connecting the city center to the Île de Nantes. It currently carries motor vehicles, trams, cyclists, and pedestrians. The bridge was built on the site previously occupied by the Nantes transporter bridge. It provides access to cultural landmarks including the Machines of the Isle of Nantes, the Parc des Chantiers, and the Memorial to the Abolition of Slavery.

The Expansion Project: A Sustainable Approach

The expansion project, slated for completion in 2027, will increase the bridge’s width from 18.5 meters (61 feet) to 53 meters (174 feet). A significant focus of the project is environmental sustainability. Existing concrete piers are being reused, saving approximately 4,800 tons of concrete and reducing the carbon footprint by 6,000 tons of CO2 equivalent. The new structure will feature nearly 1,800 square meters (19,375 square feet) of green space, walkways, and viewpoints.

Recent Developments: Arrival of the Steel Deck

A 150-meter (492 feet) long steel deck, weighing 3,100 tons, manufactured in Italy by Cimolai at their Monfalcone plant, recently arrived in Nantes after a four-and-a-half-week journey. The deck was transported by barge through the Atlantic Ocean and the Bay of Biscay. As of March 20, 2026, the deck was being prepared for hoisting into place, with a quarter turn on the barge scheduled for early Tuesday evening to position it parallel to the existing bridge. The installation of the deck was expected to be completed by Wednesday.

Future Impact and Benefits

The expanded Anne de Bretagne Bridge will significantly improve transportation options in Nantes, facilitating the integration of the new tramway lines and enhancing connectivity between the city center and the Île de Nantes. The increased width and added green spaces will also contribute to a more pedestrian and cyclist-friendly environment. The project demonstrates Nantes’ commitment to sustainable infrastructure development and urban mobility.

Key Takeaways

• The Anne de Bretagne Bridge is undergoing a major expansion to accommodate new tram lines and increase capacity.
• The project prioritizes sustainability by reusing existing infrastructure and minimizing carbon emissions.
• A new steel deck, manufactured in Italy, has arrived in Nantes and is being installed.
• The completed project, expected in 2027, will create one of the widest bridges in Europe and enhance connectivity within Nantes.

Sources:

• Wikipedia – Pont Anne-de-Bretagne
• France Bleu – Nantes: Pont Anne de Bretagne Closure
• Grimshaw – Anne de Bretagne Bridge
• Global Highways – Deck Arrives by Barge for Anne de Bretagne Bridge