Saint-Quentin-en-Yvelines is a station situated on the Paris–Brest railway. It is served by Paris' express suburban rail system, the RER Line C and by suburban Transilien Line N and U services. The station opened in 1975. It is within Montigny-le-Bretonneux.
Bus interchange
Coordinates: 48°47′14″N 2°02′40″E / 48.78722°N 2.04444°E