Grand Paris Express Line 15 South (Pont de Sèvres–Noisy-Champs)

Project overview

Forming a 33 km loop through 22 municipalities, this massive automated metro project connects Pont de Sèvres to Noisy-Champs. The Société du Grand Paris invested €6.85 billion in the infrastructure, which will move passengers across southern Paris in under 40 minutes. Extensive testing is underway; the opening has been repeatedly postponed (2025, then 2026) and is now expected in autumn 2027.