Grand Paris Express Line 18 (Massy–Versailles)

Project overview

Crossing the Saclay research plateau, this 35 km automated line connects Orly Airport to Versailles with ten new stations. The Société du Grand Paris is implementing unique third-rail power technology and elevated tracks to serve residents and researchers in the area. Initial operations between Massy Palaiseau and Christ de Saclay are expected to begin in late 2026.