Should we expect any disruption on Line U of the Transilien network in the Paris region? Between demonstrations, strikes, incidents, roadworks, station closures and other factors, we take a look at the traffic situation in real time.
Created in 1995 as a tangential link between La Défense and La Verrière, and officially renamed line U at the end of 2004, this suburban line of the Transilien network is a strategic link in the western Paris region. It is approximately 31 kilometers long.
The line serves around ten stops and follows a single route linking two major hubs without passing through a conventional Paris station. These include La Défense, Puteaux, Suresnes-Mont-Valérien, Saint-Cloud, Sèvres-Ville-d'Avray, Chaville-Rive-Droite, Versailles-Chantiers, Saint-Cyr, Saint-Quentin-en-Yvelines, Trappes and La Verrière.
The line runs exclusively through the Île-de-France region, and is entirely under the jurisdiction ofÎle-de-France Mobilités, whose route is based on older rail infrastructure. Firstly, it uses a section of the infrastructure between La Défense and the Viroflay junction, from the Paris-Saint-Lazare to Versailles-Rive-Droite line, opened in 1839, then the link between Viroflay and La Verrière, opened in 1849 as part of the Paris-Montparnasse-Brest line.
Real-time traffic conditions on line U of the transilien network:
- Line U: La Défense <-> La Verrière, running from January 17th to February 1st, on weekends:
Period: Weekends, all day long.
Dates: From Saturday, January 17 to Sunday, January 18; Saturday, January 24 to Sunday, January 25; and Saturday, January 31 to Sunday, February 1.
Schedule changes will apply between La Défense and La Verrière. VERI trains will run one minute earlier at La Défense, while DEFI trains may be delayed by up to 17 minutes along their routes.
Reason: Railway maintenance work. - Line U: La Défense <-> La Verrière 01/05 - 01/30:
Period: Weeknights starting from 10 PM.
Dates: Monday, January 5 to Friday, January 9; Monday, January 12 to Friday, January 16; Monday, January 19 to Friday, January 23; and Monday, January 26 to Friday, January 30.
Travel will be interrupted between La Défense and La Verrière. The last train from La Défense to La Verrière departs at 10:15 PM (VERI), while the final train from La Verrière to La Défense leaves at 9:20 PM (DEFI).
A replacement bus service will be available, serving intermediate stations.
Reason: Railway infrastructure maintenance work. - Line U: La Verrière to Trappes — January 31 to February 1, weekends included:
Period: in the morning
Dates: Saturday, January 31 and Sunday, February 1
Train traffic will be interrupted from La Verrière to Trappes. On Saturday: — Three DEFI departures at 5:20 AM, 5:50 AM, and 6:20 AM originating from Trappes station. On Sunday: — A DEFI departure at 6:20 AM originating from Trappes station.
A replacement bus service will be available, serving intermediate stations.
Reason: maintenance work on the railway network. - Line U: La Défense <-> La Verrière, January 31st–February 1st:
Period: from 10 pm onwards.
Dates: Saturday, January 31 to Sunday, February 1.
Train services will be suspended between La Défense and La Verrière. The last train from La Défense to La Verrière departs at 10:15 pm (VERI). The last train from La Verrière to La Défense departs at 9:20 pm (DEFI).
A replacement bus service will be available, stopping at all intermediate stations.
Reason: railway maintenance work. - Line U: La Défense <-> La Verrière from 17/01 to 01/02, weekends only:
Period: weekends, all day long.
Dates: from Saturday, January 17 to Sunday, January 18; Saturday, January 24 to Sunday, January 25; and Saturday, January 31 to Sunday, February 1.
Schedule changes will apply between La Défense and La Verrière. The VERI trains will run one minute earlier at La Défense. Conversely, the DEFI trains will be delayed by up to 17 minutes along their routes.
Reason: railway network maintenance work. - Line U: La Verrière to Trappes — January 31 to February 1, weekends included:
Period: in the morning
Dates: Saturday, January 31, and Sunday, February 1.
Traffic will be disrupted from La Verrière towards Trappes. On Saturday:
- The 5:20 AM, 5:50 AM, and 6:20 AM trips originating from Trappes station will be canceled. On Sunday:
- The 6:20 AM trip departing from Trappes station will be canceled.
A replacement bus service will be provided, serving the intermediate stations.
Reason: Railway work. - Line U: La Verrière <-> La Défense 02-13/02:
Period : during weekday evenings.
Dates : from Monday, February 2nd to Friday, February 13th.
Train services will be halted between La Verrière and La Défense. The final train from La Verrière to La Défense DEFI departs at 9:20 PM. The last train from La Défense to La Verrière VERI leaves at 10:15 PM.
A replacement bus service will be available, serving the intermediate stations.
Reason : railway infrastructure maintenance works. - Line U: from February 7 to 8, during the weekend:
Period: from Saturday morning until 12:00 on Sunday.
Dates: the weekend from Saturday, February 7, to Sunday, February 8.
Schedule adjustments will affect services between La Défense and La Verrière.
Train VERI services will depart one minute earlier at La Défense.
DEFI trains will experience delays of up to 17 minutes.
Reason: railway infrastructure maintenance work. - Line U: La Verrière <-> La Défense on 07/02:
Time: in the evening.
Date: Saturday, February 7.
Train services are suspended between La Verrière and La Défense.
Last VERI train: 11:15 PM departing from La Défense to La Verrière.
Last DEFI train: 10:20 PM departing from La Verrière to La Défense.
A replacement bus service is available, serving intermediate stations.
Reason: railway maintenance work. - Line U: La Verrière ↔ La Défense 16-27/02:
Period: during weekday evenings.
Dates: from Monday, February 16th to Friday, February 27th.
Train traffic is suspended between La Verrière and La Défense. The last train from La Verrière to La Défense DEFI departs at 8:20 PM. The last train from La Défense to La Verrière VERI leaves at 9:15 PM.
A replacement bus service will operate, serving intermediate stations.
Reason: railway network maintenance work.
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