Grand Paris Express
The Grand Paris Express is the largest transportation project in Europe, a roughly 200-kilometer network of fully automated, driverless metro lines ringing Paris and delivered by the Société des grands projets (formerly Société du Grand Paris) across the Île-de-France region.
Official WebsiteBroke ground 2015, targeting 2031. Financed with $3B from European Investment Bank in September 2026.
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The Grand Paris Express is the largest transportation project in Europe, a roughly 200-kilometer network of fully automated, driverless metro lines ringing Paris and delivered by the Société des grands projets (formerly Société du Grand Paris) across the Île-de-France region. The roughly 35 billion euro program comprises four new lines, 15, 16, 17 and 18, together with major extensions of the existing Line 14, adding 68 new stations that link the suburbs of Greater Paris directly to one another and to Orly and Charles de Gaulle airports, bypassing the traditional bottleneck of central Paris. Line 18 crosses the Paris-Saclay science and university cluster on a 6.7-kilometer viaduct, the longest in France, while the Line 15 ring loops the inner suburbs through hubs such as Saint-Denis Pleyel. Engineered around driverless trains and architecturally ambitious stations designed by an international roster of architects, and backed by multi-billion-euro European Investment Bank financing, the network opens line by line and is reshaping how millions of residents across Greater Paris live, work and move.
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Every firm on Grand Paris Express, the office nearest it, and the people who work on it.
Frequently asked
Where is Grand Paris Express located?
Grand Paris Express is located in Paris.
When will Grand Paris Express be completed?
Grand Paris Express is under construction, with completion expected in 2031 (a TMW estimate).
Who is developing Grand Paris Express?
Société des grands projets is the developer behind Grand Paris Express.
Who is financing Grand Paris Express?
Grand Paris Express secured $3B in financing from European Investment Bank in 09.02.26.