Grand Paris Express Faces New Delays in Key Metro Lines

The Société des Grands Projets has announced further postponements for the 15 South, 16, and 17 lines, citing technical challenges and testing complexities.

• The 15 South line's opening has been delayed to the fourth quarter of 2026, a six-month postponement from the previously revised timeline of summer 2026.
• Lines 16 and 17, originally expected by late 2026, are now projected to open in the second quarter of 2027 due to shared technical systems with the 15 South line.
• Technical challenges, including adjustments to automated systems and software, were cited as key reasons for the delays, according to the Société des Grands Projets (SGP).
• Valérie Pécresse, president of Île-de-France Mobilités, has called for a control and coordination mission to minimize delays and ensure greater transparency in project updates.
• The delays do not impact the northern section of the 15 line or subsequent sections of the 17 line, which remain on schedule.

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