Under Construction

Grand Paris Express

Paris · Travel

The Grand Paris Express is the largest transportation project in Europe, a roughly 200-kilometer network of fully automated, driverless metro lines ringing the French capital and delivered by the Société des Grands Projets (formerly Société du Grand Paris).

Official Website
Last verified Jul 13, 2026
5.4 yrs to delivery
58%
AnnouncedBreaking GroundConstructionOpening SoonNow Open
2015
Start
Est 2031
Completion
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The story so far
Announced 2010The Grand Paris Express automated-metro expansion (4 new lines, 68 stations) was established under the 2010 Grand Paris law; full network now phased through ~2031.
chooseparisregion.org
Broke ground 2015
Financing secured Oct 16, 2017€1B EIB loan to Société du Grand Paris for Grand Paris Express (Line 15 South), signed Oct 16 2017, per official EIB press release; second €1B EIB tranche (first signed 2016).
eib.org
Under construction Jun 24, 2024Line 14 extension to Saint-Denis Pleyel opened June 24, 2024 (first GPE segment in service, ahead of the 2024 Olympics)
en.wikipedia.org
Expected opening 2031 est.
Milestones are dated to when they actually happened and linked to their source. This record fills in over time as TMW tracks the project.
About the project

The Grand Paris Express is the largest transportation project in Europe, a roughly 200-kilometer network of fully automated, driverless metro lines ringing the French capital and delivered by the Société des Grands Projets (formerly Société du Grand Paris). Comprising four new lines — 15, 16, 17, and 18 — together with major extensions of the existing Line 14, the roughly €35 billion program adds 68 new stations that knit the suburbs of the Île-de-France directly to one another and to Orly and Charles de Gaulle airports, bypassing the traditional bottleneck of central Paris. Engineered around driverless trains and architecturally ambitious stations designed by an international roster of architects, the network is opening line by line, reshaping how millions of residents across Greater Paris live, work, and move.

Developer & design
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Common questions

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 du Grand Paris is the developer behind Grand Paris Express.

Who designed Grand Paris Express?

Grand Paris Express was designed by Société du Grand Paris.