Grand Paris Express - Metro Line 16

The Challenge

To meet the growing mobility needs of the Greater Paris area, a new fast and eco-friendly transport system is being developed: a driverless metro line designed for densely populated urban zones. Line 16 of the Grand Paris Express spans 36.2 km of double-track bored tunnels with an internal diameter of 9.8 meters, connecting 10 underground stations and integrating 37 auxiliary shafts, 9 underground junctions, and a highway bridge. The challenge lies in delivering this complex infrastructure while ensuring sustainability, safety, and operational efficiency.

The Solution

As Owner Engineer, Tractebel has played a key role in the delivery of Work Package L16-2, which includes major civil works for underground stations and shafts. Services provided cover the full project lifecycle: Pre-FEED, FEED, Basic Design, Detailed Design, Construction Supervision, and Acceptance of Works. Tractebel’s multidisciplinary expertise ensures seamless coordination across engineering disciplines, regulatory compliance, and integration of advanced technologies for automated metro systems.

The Impact

The civil works for Work Package L16-2 are scheduled for completion in early 2025, with the first half of Line 16 expected to be handed over in 2026. Once operational, the new metro line will significantly improve public transport connectivity in the eastern suburbs of Paris, reduce congestion, and support the region’s transition to low-carbon mobility. Tractebel’s contribution reinforces its position as a trusted partner in delivering large-scale, sustainable urban infrastructure.