Transilien Line N is a railway line of the Paris Transilien suburban rail network operated by the SNCF. The trains on this line travel between Gare Montparnasse in Paris and the west of Île-de-France region, with termini in Rambouillet, Dreux and Mantes-la-Jolie on a total of 117 km. The line has a total of 117,000 passengers per weekday. Passenger service started in 2004.

Rolling stock

As of October 2022, the following trains are operated on the line : SNCF Class Z 57000 (Regio 2N), and occasionally SNCF Class Z 8800. Former rolling stock include SNCF Class Z 5300, which only ran on sections electrified with 1500 V direct current, SNCF Class BB 27300 and (SNCF Class BB 7200 modified, since 2012, also only on sections electrified with 1500 V direct current) with voiture de banlieue à 2 niveaux coaches, which are currently being withdrawn alongside Z 8800 material.

Rambouillet Line

This line, according to SNCF, will travel from start to the terminus in 1 hour, and operates as per this route, on the Paris–Brest railway: This line is electrified using a 1500 V direct current.

Dreux Line

This line according to SNCF will get from start to terminus in 1hr, and operates as per this route, on the Paris–Brest railway up to Saint-Cyr, then on the : This line is electrified using a 1500 V direct current between the Montparnasse station and the Plaisir-Grignon station, and a 25000 V alternating current elsewhere.

Mantes-la-Jolie Line

This line is electrified using a 1500 V direct current between the Montparnasse station and the Plaisir-Grignon station, and a 25000 V alternating current elsewhere.

Names of service

Like other Transilien lines the name of service consists of four letters, but is not always displayed on trains, but it can be seen on passenger information display systems. Taking GEPU (which is for a train that runs express between Paris-Montparnasse and Sèvres-Rive-Gauche then stops all stations to Plaisir-Grignon) as an example, the table describes how names of services are structured. There is also codes given to Chartres TER services, which are PACE towards Paris-Montparnasse, and CAPO towards Chartres.