Grand Paris Express: the inauguration of line 15 South postponed to summer 2026

The Grand Paris Express will truly disrupt the daily lives of many Ile-de-France residents, already accustomed to public transport. In the future, travelers will no longer have to go through Paris to reach, for example, Pont de Sèvres from Arcueil – Cachan. Thanks to the future ligne 15users will be able to connect these two cities in just 11 minutes compared to 48 minutes today!

The opportunity to dwell a little longer on this line 15 of the Grand Paris Express which will be moreover the longest metro line in France. Thus, the ligne 15 will tour Paris over a distance of 75 kmcrossing no less than 45 communesincluding those of Saint-Denis, Aubervilliers, Bobigny, Bondy, Rosny, Val-de-Fontenay, Champigny, Noisy-le-Grand, Saint-Maur, Créteil, Villejuif, Vitry-sur-Seine, Arcueil, Cachan, Bagneux, Châtillon, Montrouge, Issy-les-Moulineaux, Sèvres, Saint-Cloud, Suresnes, Nanterre, La Défense or even Bois-Colombes. In the end, the ligne 15 will travel the rails of four departments of Île-de-France: Hauts-de-Seine, Seine-Saint-Denis, Val-de-Marne and Seine-et-Marne.

« By forming a ring road all around Paris, line 15 will improve access to employment, universities and major sporting and cultural venues in the Ile-de-France region such as the Stade de France in Saint-Denis and the MAC/VAL Museum of Contemporary Art. in Vitry-sur-Seine or the Seine Musicale in Boulogne-Billancourt » specifies the Major Projects Companyadding that this ligne 15 will also connect several large activity zones located in La Défense, Saint-Denis Pleyel and Val-de-Fontenay, while being closer to health and education facilities, such as the Gustave Roussy Institute in Villejuif, the Avicenne hospital in Bobigny or the Condorcet university campus, located in Aubervilliers.

Another advantage, and not the least, almost 95% of line 15 stations will be in connection with the existing transport network, namely the Transilien, the RER, the metro, the tramway or even the bus.

Side stations, 36 will be served by this future line 15distributed over three sections: East, West and South. Among the most anticipated are the train station Noisy – Champs. With platforms located between 13.5 and 21 meters underground, it will be one of the interconnecting stations of the Grand Paris Express to accommodate two lines of the new metro, namely lines 15 and 16.

Another station that might get people talking? The Green Houses. With platforms located 35 meters underground, and with eleven levels including nine underground, it will be one of the deepest in the world. Grand Paris Express. But the deepest station in the future network, and indeed the deepest in France, will be contested Saint-Maur – Créteil station. With platforms located at a depth of 52 meters (compared to 29 meters on average for other stations in the Grand Paris Express), this future Saint-Maur – Créteil station will be spread over nine underground levels. To access the platforms of this line 15 Southusers will have to take a staircase called “monumental“, or one of the 11 elevators available.

Let us also cite the Vitry-sur-Seine Town Hall stationdescribed by the municipality as a “ cave races » !

Future stations on the eastern section of line 15

• Saint-Denis Pleyel
• Stade de France
• Aubervilliers town hall
• Aubervilliers Fort
• Drancy – Bobigny
• Bobigny Pablo-Picasso
• Bondy Bridge
• Bondy
• Rosny Bois-Perrier
• Val de Fontenay
• Nogent – Le Perreux
• Champigny Centre

The future stations of the western section of line 15

• Sèvres Bridge
• Saint-Cloud
• Rueil – Suresnes Mont-Valérien
• Nanterre La Boule
• Nanterre La Folie
• Defense
• Bécon-Les-Bruyères
• Bois-Colombes
• The Agnettes
• The Grésillons
• Saint-Denis Pleyel

The future stations of the southern section of line 15

• Sèvres Bridge
• Issy
• Clamart
• Châtillon – Montrouge
• Bagneux
• Arcueil – Cachan
• Villejuif Gustave-Roussy
• Villejuif Louis-Aragon
• Vitry-sur-Seine town hall
• The Ardoines
• The Green of Houses
• Créteil – L’Échat
• Saint-Maur – Créteil
• Champigny Centre
• Bry – Villiers – Champigny
• Noisy – Champs

Quid you work schedule and theinauguration of this future line 15 ? Due to its many kilometers of rails, the commissioning of line 15 is will gradually. Announced for the end of 2025, the commissioning of the South section (between the Pont de Sèvres and Noisy-Champs stations) is finally postponed to summer 2026. This was announced on November 28 by the Société des Grands Projets. The reason? Of the “delays in conducting tests“. “We need to deepen our testing phases, to guarantee an optimal level of technical performance, in particular for Île-de-France Mobilités which will be responsible for managing it.“, explained Jean-François Monteilsthe president of the Société des Grands Projets.

The commissioning of line 15 South, which is to be the first to see the light of day on the Grand Paris Express network, has already seen its opening postponed several times. Initially announced for 2020, the inauguration was postponed for the first time to 2023 then to 2024 and the end of December 2025. From now on, the southern section of line 15 should be put into service in the summer of 2026.

Then, the inauguration should be completed in 2031 with the commissioning of the Eastern sections (between Champigny Center and Saint-Denis-Pleyel stations) and West (between Pont de Sèvres and Saint-Denis Pleyel stations).

Connections assured on future line 15

• Saint-Denis Pleyel: line 14 and RER D
• Stade de France: RER B
• Aubervilliers town hall: line 12
• Fort d’Aubervilliers: line 7
• Drancy – Bobigny: T1 and T11
• Bobigny Pablo-Picasso : T1 and wood 5
• Bondy Bridge: T1
• Bondy: T4 and RER E
• Rosny Bois-Perrier: RER E
• Val de Fontenay: RER A and E
• Nogent – Le Perreux: RER E
• Pont de Sèvres: T2 and line 9
• Saint-Cloud: lines L and U
• Rueil – Suresnes Mont-Valérien: none
• Nanterre La Boule: none
• Nanterre La Folie: RER E
• La Défense: T2, line 1, RER A and E, lines L and U
• Bécon-Les-Bruyères: Line L
• Bois-Colombes: line J
• Les Agnettes: line 13
• Les Grésillons: RER C
• Issy: RER C
• Clamart: line N
• Châtillon – Montrouge: T6 and line 13
• Bagneux: line 4
• Arcueil – Cachan: RER B
• Villejuif Gustave-Roussy: line 14
• Villejuif Louis-Aragon: T7 and line 7
• Vitry-sur-Seine town hall: T9
• Les Ardoines: RER C
• Le Vert de Maisons: RER D
• Créteil – L’Échat: line 8
• Saint-Maur – Créteil: RER A
• Champigny Centre: none
• Bry – Villiers – Champigny: RER E and line P
• Noisy – Champs : RER A et ligne 16

Visit the Société du Grand Paris website and the Société des Grands Projets website to find out more!