Line 18 of the Grand Paris Express metro

Sweco joined forces with the consortium PUENTES (Spain) and URANO (France) to prepare, at the request of the Société du Grand Paris (SGP), the construction of the second part of Line 18, consisting of a viaduct and 3 above-ground stations.

Sweco is the engineering agency responsible for the design and engineering of the deck construction, the piles and special elements on the intersection of the viaduct and the above-ground stations. In addition, Sweco studies the integration of the landscape, the roads and various networks (VRD), the risk analysis and the management of external interfaces.

Line 18 will facilitate travel for the inhabitants of Essonne and Yvelines thanks to its many connections: Transilien lines N and U, RER B and C, the T7 tram line, the Massy-Evry tram train and various bus lines. It will be a fast gateway to Paris thanks to the connection to Line 14 of Orly airport station. Exchanges with the whole of France and abroad will also be improved by connections to Massy-Palaiseau (TGV) and Orly airport.

Line 18, which crosses a strategic area of Greater Paris, will serve one of the world's leading research and development centres, Paris-Saclay. It will also connect the major economic centres of Orly, Antony, Massy, Saint-Quentin-en-Yvelines and Versailles.

Line 18 meets the travel needs of residents, students, researchers and staff who live, study or work nearby. Line 18 will be inaugurated in 2026 between Massy-Palaiseau and CEA Saint-Aubin, in 2027 between Massy-Palaiseau and Orly airport and in 2030 between CEA Saint-Aubin and Versailles Chantiers.

Key figures :

- 10 stations, 3 of which are connected to the Ile-de-France transport network

- 13 municipalities involved in 3 departments

- 100,000 scheduled trips per day

- 35 km automatic metro, of which 14 km above ground