Paris Métro Line 18
Paris Métro Line 18 is a planned line of the metropolitan network of Paris.

It will be an automatic metro line with an adapted gauge of the Grand Paris Express. 35 kilometers long, it will initially link Orly Airport to Versailles via Massy – Palaiseau, the Saclay plateau and Saint-Quentin-en-Yvelines. Subsequently, it would be extended by about 15 kilometers from Versailles to Nanterre via Rueil-Malmaison.

It should be completed after 2030. Its first section, from Orly airport to the Saclay plateau (CEA Saint-Aubin), is scheduled for 2026 between the stations of Massy-Palaiseau and CEA Saint- Aubin, and 2027 between Massy-Palaiseau and Orly airport. One of its vocations is in particular to serve the technological and scientific pole Paris-Saclay and the Paris-Saclay University. It should also have given access to the site which was envisaged for the aborted project of French candidacy for the organization of the Universal Exhibition of 2025.

Project management for engineering and stations has been entrusted to the Icare group, led by Ingérop Consulting and Engineering, with several architectural firms for the various stations of the section while the systems are under the responsibility by Egis Rail. The viaduct and the overhead stations are entrusted to the Benthem Crouwel group.

It will be the only metro line of the Grand Paris Express that will serve the department of Yvelines with three stations in two municipalities: the station of Versailles-Chantiers and that of Satory will be located at Versailles and the Saint-Quentin Est station will be located at Guyancourt.
Q50716
metropolitan network
LOC
Q867203
Grand Paris Express
LOC
Q223416
Orly Airport
LOC
Q2946
Versailles
LOC
Q801166
Massy – Palaiseau
LOC
Q94852
Saclay plateau
LOC
Q1120022
Saint-Quentin-en-Yvelines
LOC
Q2946
Versailles
LOC
Q170507
Nanterre
LOC
Q640806
Rueil-Malmaison
LOC
None
CEA Saint-Aubin
UNK
Q251665
Paris-Saclay
ORG
Q13531686
Paris-Saclay University
ORG
None
Universal Exhibition of 2025
UNK
None
Ingérop
UNK
None
Egis Rail
UNK
Q181348
viaduct
Concept
Q12820
department of Yvelines
LOC
Q2422473
Versailles-Chantiers
LOC
Q2946
Versailles
LOC
Q237303
Guyancourt
LOC
Q3240157
Paris Métro Line 18
Concept
2030-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2030
DATE
2026-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2026
DATE
2027-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2027
DATE
2025-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2025
DATE
+18^^http://www.w3.org/2001/XMLSchema#decimal
18
NUMBER
+35^^http://www.w3.org/2001/XMLSchema#decimal
35
NUMBER
+15^^http://www.w3.org/2001/XMLSchema#decimal
15
NUMBER
part of
length
located in the administrative territorial entity