Under Construction
Grand Paris Express
Paris · Travel
The world's largest metro project in construction — 200km of new automated metro lines encircling Paris, connecting suburbs and airports with 68 new stations.
Official WebsiteLast verified Jul 8, 2026
5.5 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.orgBroke ground 2015
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.orgExpected 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.
Developer & design
Developer
Architect
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.